Why does not recognize the USB USB flash drive. What if the USB device is not recognized? Power supply faults or excessive overload of a USB portal current

Greetings to all in the next release, dear users. I think, probably, each of you have been observed when when connecting the printer, flash drives or hard disk An error "USB device is not identical" appeared.

As experience shows, the "Windows XP, 7, 8 and 10" users are faced with this problem. In this article, I will tell you how to cope with this error and return the device to work, be it a printer or simple flash drive. Step-by-step instruction Designed not only for standard USB 2.0 devices, but also for USB 3.0. In general, we can say that operating system Windows can not identify something or another uSB device by different reasons. Solutions, respectively, too much. I will talk about the basic methods of returning the device to work.

Instructions for eliminating the problem of broken into three separate parts:

First part - Check the USB device.

The second part of

The third part - Solving a problem with USB 3.0 work in the eight.

USB device is not recognized

It is worth saying that the third stage can help the owners of conventional USB devices 2.0. For some reasons, it is version 8.1 that constantly conflicts with new devices. In any case, if the mouse, keyboard or any other device is a worker, then the problem can be solved by the "software" path.

First - Check the USB device and solve the problem

You need to start with the most simple actionSo that in vain does not waste time. There is a chance that the error appears due to a damaged device, that is, problems are not in the operation of the operating system. So I recommend checking whether it works, the printer, mouse, keyboard, hDD Or another "USB gadget" - it will save time, you do not have to try to start the non-working device.

The easiest way will be verified by connecting the device to another computer. The only requirement for this laptop or computer is working USB ports. Do not forget that almost every USB computer ports are located not only in front, but also from behind - try connecting the device from different sides. If the device does not work on another "machine", it makes no sense to use the methods described above - it is necessary to include the device in service center Or immediately replace with new. And it is better to read below my articles below:

From the above articles, you may find your solution to the problem when an error occurs - the USB device is not recognized. If not found, then moving on.

This method is suitable for those users who cannot check the device on other computers. It is also worth using this method if before this flash drive or other USB device worked fine. The process consists of two simple steps:

- You inserted the device, the system gave a familiar error "USB device unidentified". It is necessary to remove the device and turn off your laptop or computer. And you need to do this completely - we pull the plug out of the outlet and clamp the power button for about 10 seconds - this must be done in order to completely output the charges from the computer components and, most importantly, from motherboard. Now the PC or laptop is completely de-energized.

- Run your computer and try to connect the USB device with which an error pops up. After rebooting the operating system and full reset The component may earn again. If it does not help, then we go to the following ways.

There is another method that can solve the problem. It is possible that too many USB devices are simultaneously connected to your computer. It is necessary to extract everything other than the problem device. This device is recommended to connect to the rear panel of the PC (no difference for the laptop computer). It worked? Then connect the rest of the components again, then the error must go.

IMPORTANT! Some devices that are connected to USB ports have external source Nutrition. In this case, you need to connect it and see if it starts from a battery or outlet. It will also be easier to find out if the power supply device works. Go to the second part in which I tell you how to fix the USB error is unidentified.

The second part of - We restore the operation of the device through the task manager and check the drivers.

So, the error "USB device is unidentified" appeared, we made sure that the device on other computers works properly. So, the problem lies in the device manager connected to the computer, or rather - in the drivers. This method is suitable for all modern operating versions. windows systems, including the "top ten". About the task dispatcher, I wrote a separate deployed article:

What is the task manager, nuances and chips

You can get into the task manager in several ways: in the "Run" menu, enter the "devmgmt.msc" command, and then confirm its action by the "Enter" key. It can also be done using the "Win + R" key combination. If you are used to go to the standard path, then right-click on the "My Computer" icon, go to "Properties", there you will see the Device Manager tab on the right side.

The device that the operating system cannot identify will most likely be in the USB controllers or "other devices" sections. You can find it by the "Unknown Device" label, opposite the problem component will be a yellow triangle with an exclamation mark (for Windows 7).

If you have seen a problem component in the "Other Devices" section, you can try to start automatic search Drivers. Of course, the system will be able to do this only if your computer is connected to the Internet. You need to click the "Update Drivers" button. If Windows did not find the driver, then try download them yourself. To do this, find out the device name, and then find software for it: go to the manufacturer's website and go to the "Downloads" section.

In the case where the unknown component is displayed in the USB Controllers section, it is worth trying other solutions to the problem:

With the right mouse button on a problematic device and select the Properties tab, you need to go to the "Driver" tab. Press the "Rollback" button (this can only be done if it is actively if not, then you should click on the "Delete" button). Returning back to the problem USB device, press the "Action" button in the Manager, and then click on the "Update Configuration this device" After that, the actions should be checked if the device disappeared the statute of an unidentified device.

Another option is to go to the properties of all devices with the name "Generic USB HUB", which are connected to your computer. Go to the "Power Management" section. There is a chance that the power saving mode will be activated here. You need to remove the checkbox from the item "Allow the disconnection of the component to save energy", as shown in the screenshot below.

There is a way that helps with system error 43, which appears when problems with uSB connection devices. Usually this error is found in windows version 8.1, but sometimes it appears in the top ten. You need to go back to the devices that were listed in the previous two ways. Now you need to click on the right mouse button on the problem component and select "Update Drivers" in the context menu.

Now you need to select the search mode software On this computer, then click on the "Select the driver from the installed list" section. You will appear a list where compatible software will be indicated. Click on it with the left mouse button and move on. After that, an automatic reinstalling of the driver will be performed. There is a chance that the device will work again in normal mode. If the "USB device is unidentified" error still occurs again, then it's time to go to the third part of our today's article with you.

The third part - solving a problem with USB 3.0 work in the eight

Judging by user reviews, Windows 8.1 quite often gives an error when trying to connect external hard drives or conventional drives that work on USB 3.0. Usually an error pops up on modern laptops.

In this case, the problem must be solved by changing the parameters of the power supply of a portable computer. You must go to "Control Panel", find a section called "Power Parameters". Click on the scheme that is used, and then select the section "Change additional settings Power supply. In this menu, you will see the item responsible for turning off some USB ports. Our priority task is to prohibit temporary shutdown, as shown in the screenshot below:

In conclusion, I suggest you to see a small review if your USB device is not recognized by the computer.

So, dear users, completing today's post "USB device Unidentified", I still hope my instructions will help you run a problem device. You first should check the drivers and the efficiency of the USB component on another computer. On this, everything and all before the meeting already in the next issue.

"USB device is not identified" - Pretty daily and common problem. In most cases, it is not critical, so it will not be difficult to fix everything in a couple of minutes.

The reason for this error can be in a USB port, cable, incorrect work Connected device or crash drivers. And this is an incomplete list. To begin with, you should make sure that the error is non-serious and can be easily eliminated.

Try disable all the extra devices, and then connect the desired one.
Use another computer port.
Check the integrity of the cable and ports. If possible, use the other cord.
To exclude a device malfunction, try connecting it to another computer.
You can also restart both devices.

If none of the options affected, it means that the problem is a little more serious and requires some manipulations.

Method 1: Driver Update

In most cases, updating drivers can help eliminate the problem. The system can automatically load inappropriate components, especially if your PC does not support or does not have drivers for windows 10.

Clamp Win + S..

Enter the search field "Device Manager".

Open the first result.
Open "USB Controllers" Or another section in which your device can be. The driver selection depends on the cause of the problem.

Right click on the required object and find "Properties". The device can be indicated as an unknown.

Go to the tab "Driver".
- Option "Update ..." makes it possible to install driver updates yourself or automatically.
- Function "Roll back" It is used if the device driver does not want to work correctly.
- "Delete" is used for full reinstall. After removal, you need to open "Act" — "Update Equipment Configuration". However, you can use other means to update.

Also check whether in the section "Power Management" Bottling on the contrary "Allow shutdown ...". If there is, remove it.

Reinstallation or rollback of drivers should be enough, but if it does not help, then go to the next method.

Method 2: Installing Updates

Often due to the lack of necessary updates in Windows 10, errors associated with USB devices may appear. In this case, you need to download and install the necessary components.

Usually updates are loaded automatically, but in some cases it may not happen. If you find problems with download or installation, we have on the site there are appropriate instructions for eliminating them.

With this problem at least once, but everyone faces: you connect your smartphone or tablet to a computer by means uSB cableBut besides charging, nothing happens. The computer does not see the phone or defines it as an unknown device. The situation is common, but ambiguous, and the reasons for which it occurs is quite a lot. Today we will understand what causes such malfunctions and how to deal with them.

To the situation when the PC does not recognize the mobile device connected to it, drive software and hardware failures:

No device driver in the PC operating system.
Mind of device model driver.
The absence in the USB driver system or fails to work.
Connecting a cable that is unsuitable for data transmission or damaged.
Malfunction of USB sockets (both on a computer and on the phone), a group of sockets or a USB controller on a PC.
Fault of something from computer equipment, static electricity blocking.
Error in the system settings of the phone.
Blocking access to the phone with protective programs running on the PC (including with a viral infection of the gadget).
The application will fail with which the phone and PC synchronization is satisfied (if you use).

When software problems The computer, as a rule, does not displays the contents of the phone's memory, but the device can be loaded when connected to it normally. If the problem arose due to a physical malfunction, charging most often also does not go, but there are exceptions when only data transmission lines do not work.

Outline possible causes Helps the analysis of the previous situation - what happened before the problem arose. For example:

You reinstalled the operating system on the computer or deleted part of the drivers (the reason is in the absence necessary driver).
The phone (tablet) ceased to be determined after the firmware, cleaning viruses, delete applications, optimization and other manipulations from the OS (failure in the operation of the mobile device operating system).
The device was mechanically exposed (a USB-slot is damaged) or was repaired (after replacing parts, the driver of another version is needed or the fault is not completely eliminated).
You use a USB cable that previously never connected the phone to a computer (the cable is intended only for charging or spoiled), etc.

Quickly determine the culprit problem

Tracking causal relationship greatly facilitates localization of the problem, but about half of the cases it does not precede anything concrete. If you have this way, the following actions will help determine where the failure occurs - in a mobile device, PC or USB cable.

Strain the cable in the connectors area (in these places there are most often formed by chances) and watch if the phone will not determine (tablet) in the conductor or computer device manager. Or connect the devices to others, knowingly working and suitable for data transfer cable.
Connect the phone to another computer, as well as another mobile device to this PC. If the phone is not determined anywhere, the problem is definitely in it. The same in the case of a computer.
If the reason is presumably in the computer, check the phone in all USB jacks, perhaps the problem in one or more of them (for example, only in the front group).

If you concluded that the source of the problem is the cable, just replace it. What to do in other cases, read on.

The culprit of the failure is the phone. What to do?

If the diagnostics explicitly indicate a problem with a mobile device, follow the steps below. After each step, check whether the problem is eliminated. If not, go to the next.

Restart the device.
Connect the phone to the computer. After the connection, slide down the curtain of the quick settings menu and make sure that the "Connect as" list is not marked with "Charging only", as well as the "Camera" or "Media Device". Select the "USB drive" option.

Open system settings Android (in older versions - "Parameters"). Go to section " Wireless networks" Turn on the modem mode. Or vice versa, if it is turned on - turn off. In some Android editions, this parameter is controlled not only by the modem, but also the connection of the gadget to the PC as a drive.

Experiment with the transfer of the device to USB debug mode. Open the "System" and "for Developers" section in the parameters. Remove either check the box near the Usb Debug item.

Disconnect the phone from the computer, turn off and remove the battery from it (of course, if it is removable). After 5 minutes, install the battery in place, turn on the device and try the connection.
Delete the applications after installing which the failure manifested. If the connection does not work in a specific application for synchronization, make it a cache. If it does not help - reinstall (and on a mobile device, and on a PC) or try using analog.
Scan the device with antivirus.
Reset the device's operating system to the factory settings.

The culprit of the failure is a computer. What to do?

Complete the operation of the OS, turn off the PC from the socket (or press the key on the power supply) and 15-20 seconds hold down the POWER button. This will discharge the tank and remove the wandering static charge that can block the definition of the connected device.
If the phone is not recognized only by one USB port group, open the lid system Block And make sure the reliability of their connection. By the way, normal charging Mobile device through the port does not yet indicate the health of the second.
Load the operating system. Open the Device Manager and check whether the portable devices are present in the equipment list, and among them your phone. If it is present, but marked with a black arrow in the circle (disabled), click on the line of the right mouse button and select the Enable Device command in the menu.

If there are unknown devices in the list of equipment (marked with an exclamation mark in the yellow triangle), perhaps one of them is the phone. In order to make sure that it is, disconnect the mobile device from USB. If the unknown device disappears from the list, it means that it is. And the cause of the failure is the absence in the system of the desired driver. How to reinstall and from where to download the driver to the phone, we will tell a little lower.
The problem with the recognition of the connected devices may be due to load failure, damage or absence of USB drivers. In this case exclamation signs will be in the "USB Controllers" section.
Reinstalling drivers did not help? Schedule the computer disks with antivirus and, after temporarily disable the protective programs. By the way, the latter can block access to a mobile device as a carrier if there is a suspicious or obviously malicious software. So the viruses should check and the phone too.

Delete the programs after the installation of which the problem occurred, or make the system recovery at the checkpoint created per day when there were no problems yet.
If, in addition to the phone, the computer does not recognize other devices connected via USB - mouse, keyboard, printer, flash drives, etc., (they are charged or not - not indicative), a source of failure can be any faulty component of the system unit or then from the periphery. You can determine the culprit at home in the method of alternately shutting down or replacing the equipment on knowingly serviceable.

How to reinstall the Mobile Device Driver and USB on a Windows Computer

iPhone.

Connect the iPhone to PC.
Open the% CommonProgramW6432% \\ Apple \\ Mobile Device Support \\ Drivers folder (in order not to type command manually, copy it from here, insert any folder into the address bar and click the transition button). It contains 2 files (out of four) with extension.inf - usbaapl.inf and usbaapl64.inf.

Open the context menu of each of these files and execute the "Install" command.
After installation, restart the computer.

Android

Android smartphones and tablets, such as Samsung, Xiaomi, Lenovo, Meizu, HTC, etc., as a rule, do not create separate folders to store their drivers, and on official websites they often do not find it easy to download and Reinstall. Therefore, to begin with, you should entrust the reinstalling already present in the Windows drivers system.

How to do it:

Open the context menu of the problem device in the Device Manager. Select the "Update Driver" option.

In the next window, to start, select Automatic Search for Updates. If Windows does not find anything suitable, check the second item - installation and search for manually drivers.

Next, click "Select from the list available on the computer." In a new window, all drivers will be displayed mobile deviceswhich are already installed on the PC.

To narrow the search, in the "Select Driver for this device" section, set the "Only Compatible" label. Mark what more matches your query (if in the list more than one item) and to go to the installation, click "Next".

To make the driver correctly, restart the computer.

If the reinstallation of the driver already standing in the system did not help, you will have to search for something else on the scope of the network (with a risk to download instead of the desired virus), so download them only with reliable and proven sites, like 4pda.ru, and check the antivirus before installing.

The driver of the most common mobile gadget models are also collected in the USB Android drivers application, which is available for free download on Google Play.

USB driver for Windows usually without problems are on the sites of laptop manufacturers or desktop motherboards. Sometimes they are part of the driver for the chipset.

If the phone is not recognized in the firmware mode

That computer and phone do not see each other in FastBoot mode, specifies the message "Waiting for Device", which appears in the firmware program. Most often, this error occurs due to the lack of a mobile device driver in the system, so you first do what is written above - reinstall the driver or download and reinstall it.

If not helped:

Make sure that you exactly follow the instructions for working with the firmware installation program and it is running on behalf of the administrator.
Check whether the USB debugging on the smartphone is enabled (if not, turn on), and the device itself is in Bootloader mode. If this mode is locked, locked the User Unlocking Instructions for your device model.
Connect the phone as short as possible and obviously a good cable to the USB rear jack, without using any adapters and hubs.
Perhaps your phone does not support uSB standard 3 (Blue nest), so connect it only to USB 2.0 (black sockets).
Install all the Windows updates issued on your computer.

If the problem persists even after that, try to perform the phone firmware on another PC. And better - with a different version of the operating system.

When the problem in the breakdown of the physical interface

Faulty physical interfaces, especially on a mobile gadget, preferably not to use at all (do not load the current to avoid exacerbation of the breakdown), even if the phone or tablet saved the ability to charge through them. You can organize the transmission of content either by wireless communication (Wi-Fi, Bluetooth), or through cloud serviceswhich are available on the other device. In particular, iTunes and ICloud for Apple's Technology, Google Drive., Yandex Disc, Dropbox, Microsoft Onedrive and many others - for everyone.

Cloud services It is convenient to use for transmission photos, video, music, documents and other types of files. To synchronize contacts on android and PCs are enough Gmail mail features. And to control the phone directly from the computer, you can put the application like MyPhoneExplorer on them (consists of 2 parts - for phone and for PC), which supports and wired and wireless connection Devices, without requiring installation of drivers. Very comfortably.

In a word, there is always a way out and often much easier than it seems at first glance.

When connected to your computer or laptop mobile phone, flash drives, outdoor hard disk, printer, scanner or any other device via universal serial tireYou may encounter a very common mistake - USB device is not recognized With the comment "One of the devices connected to this computer is incorrectly or not detected to determine it." It is found both in Windows 7 and on the most modern version of the Microsoft operating system - Windows 10. It looks like this:

In English-speaking versions, this is an error "USB Device Not Recognized":

Why this error appears and whates there are ways to fix it and eliminate - we will talk today and talk.

Cause 1. Cables, extension cables and hubs

The low quality of cheap USB cables, adapters and splitters (they are "hubs") are the most frequent source A variety of problems with devices connected via a universal bus. Therefore, when an error "USB device is not identical" appears, the first thing to try to do is to exclude an intermediate link in a video of an extension cord or hub. That is, the flash drive, 3G / 4G-modem and the like pieces we connect directly to the USB port on the computer's motherboard. The front connectors on the system of the system unit are also not suitable because it is also the cause of a malfunction, which means "trust" they should not.

In the case of a printer or scanner - pay attention to the integrity of the cable. If there are visible damage - use another cable. It is inexpensive and this does not spit your budget at all.

Cause 2. Faulty USB Port

The second very common cause of problems with work external devices — physical damage Or even a USB port breakdown. Paradox, but often people who wash two three times a day, do not follow the cleanliness of the equipment with which they communicate every day. Especially the system blocks suffer from this. They are often loved "Show" in the most dusty and dirty corner. As a result, the dust is stuffed in all possible places, including USB ports. I even happened to detect mummies of various beetles and insects there. Yes, and contact contamination also does not contribute stable work connector. In addition, there were cases when users were so reliated by the mouse, a printer or a flash drive, which simply broke the port.

Therefore, when the error appears, "one of the devices connected to this computer is incorrectly", carefully inspect the connectors for contamination of contacts or damage them. Try to switch to neighboring and see if there are mistakes on it. In addition, it is worth opening the device manager and look at USB controllers - whether the red cross is worth any of them. This usually suggests that he has failed and requires the repair of the motherboard. Sometimes, though he saves the installation of an additional controller in the PCI slot.

Cause 3. Drivers and Software Failures

Problems when installing a drivers of a gadget - this is another possible cause of occurrence. windows errors "USB device is not identified." If you open the device manager, then you will see a yellow triangular icon in the list of controllers in the list.

At the same time, it will be signed as "an unknown USB device (listed failure)". This can happen as follows that the operating system cannot find suitable drivers (For example, when updating OS to Windows 10), or there is a conflict between the already installed and new. To correct the situation, you must first find on the Internet last version Drivers for connected devices, download and try to install.

If you do not know what to look specifically, then go to the properties of the device, open the "Details" tab and select the "EN END" in the list.

Below in the field will appear identification lines. They find two identifiers - Vid. and PID. Remember or write them. We climb on the Internet (for example, on the site pcidatabase.com) and we are looking for detailed information About connected removable disk, phone, mice, printer, scanner, etc. And then you need to search for and install actual version Drivers.

But if you think that the error "USB device is not recognized" is associated with a possible conflict of old and new drivers, it will have to completely remove those and others to eliminate it. This is done either again through the device manager or using third-party utilities. After you clean the system from failed software, you will need to put the latest version and check the operation of the device.

Cause 4. Fault of the device itself

Yes, unfortunately, such a trouble happens. Especially often it happens with flash drives and external hard drives. They either completely refuse to the controller, or the area will be sold on which the firmware for the chip is recorded. It can not boot and therefore the computer does not understand what it puts the brand "Unknown USB device".
Check it out on another computer. If there is the same error there, then enter the service or on the trash. For example, I thus fell wireless mouse. On another PC, she earned without problems. Most likely there was a conflict of her radio module with something else in the room.
Sometimes a malfunction may occur due to insufficient nutrition. It happens with external hard hDD disks. In this case, they must be connected not through one, but after two ports immediately. For this, the kit has a special cable.

Note: If when turned on various techniques Or gadgets via a USB, a computer or laptop begins to behave strange: it turns off, restarts or hangs, then immediately disconnect it and carry it to the service. As a rule, this indicates the malfunction of the most connected apparatus and further independent diagnostics can lead to even more sad consequences.

Each user of the computer and flash drives at least once dared in a situation where the flash drive failed. That is, it is impossible to view the information that is stored on it. The flash drive does not work, the computer does not see the flash drive, the files are either not recorded, or do not drop from the flash drive, or shows the discrepancy between the volume of the storage device.

But first things first.

The computer does not see a flash drive

In fact, problems that affect the definition of a flash drive computer, there is a lot - even the version of the operating system itself.

And so, you inserted a flash drive into the computer, it is not defined. How does this manifest?

The computer tells you about what you need " insert disk" Even when you did it.

The computer writes that the disk must be formatted because it is not formatted;

An error has occurred;

The computer hangs when the flash drive is inserted;

The device is not identified.

Now you will read a small instruction on how to solve the problem when the computer does not see the flash drive. But this does not mean that this instruction will help you 100%. If one way does not help, go to another until the problem disappears.

Go!

The first thing you can do is check if the utility sees disk management»Your USB flash drive. To do this, launch this very utility:

Press Start → Perform (Win + R)→ Enter → diskmgmt.msc.→ Press ENTER. OR

Control Panel → Administration → Computer Management → Disk management.

In the disk management window, pay attention to what happens when connecting and disconnecting a flash drive to a computer - disappears the disk and appears again, or not?

As the best option - this is when the computer sees a flash drive, and all the sections on it are in a state " Form" If so, then we do the following: click on it with the right mouse button and select the item in the context menu. make a section active" You may need to assign a letter to the section.

Well, in principle, it will be enough for the computer to see the flash drive.

Well, if suddenly a message will be displayed in this utility " Unknown" or " Not initialized", As well as one section in a state" Not distributed", It will mean that the flash drive has damage. Therefore, the computer does not see a flash drive. You need to recover data (more than this).

If you connect your flash drive via an extension or USB-hub, then try to connect it directly. Also try to connect to all available ports for USB. Further, as an option, you can turn off and restart the computer, disable other devices from the computer (well, in addition to the keyboard and mouse of course), and then restart the computer. In this case, if the flash drive is determined and earned, then the problem is obvious in nutrition on uSB portslacking elementary power. Tip One - Replace the power supply to more powerful.

Option with the removal of old drivers

Use this option in the case when the computer does not see the USB flash drive and writes " Insert the disk", Provided that the flash drive is already inserted. This problem and not only can cause old drivers that are available in Windows. For example, when you connect a flash drive to a computer, your PC is turned off or reboots.

The reason is all that Windows installs the drivers for flash drives while you are connecting them to the port for the first time, and when you turn off the USB flash drive, then the drivers remain in the system and do not go anywhere. Then you connect new flash drive, there is a conflict that are caused by the Windows Reaction when trying to use old driverwhich was set during the connection of the first flash drive.

How to remove old drivers?

To begin with, turn off the computer. Disconnect all memory devices from it and peripherals, accessories.

Turn on the computer.

Download the utility DriveCleanup.

Copy, depending on your version of Windows, 32 or 64-bit versions driveCleanup.exe. in daddy C: \\ Windows \\ System32.

Run command line On behalf of the administrator (right mouse button on the menu " Start") And introduce driveCleanup.exe. . Press ENTER And we see how the computer deletes to all drivers and records.

After completing the deletion, simply restart the computer, insert a new USB flash drive and installs new drivers to it.

USB device is not recognized

When you connect a flash drive, printer, or another any device that connects via USB in Windows 7 and Windows 8.1, and you see an error, an unidentified device - read this instruction and we will try to figure out.

The reasons why Windows cannot identify the USB device is actually a lot, respectively, there are also many solutions.

The device is not identified. What to do?

If you encountered a problem when you insert a flash drive and a message appears that you have connected an unidentified device when connecting any device via USB, make sure that the USB itself is in good condition. This will save our time with you. What would make sure USB plug You can try to connect it to another computer or laptop. If everything also does not work, then the problem is in the device itself. If it works - we read on.

This method for those cases when the device previously worked without comments. Everything was determined.

Turn off our USB device that cannot recognize the computer, turn off all devices that in this moment We do not need time, and connect the device that is not defined to the rear panel of the system unit and see whether the problem is solved.

Correction of the message " The device is not identified" through USB Device Manager and Driver Manager.

Go to B. Device Manager (Press Win + R keys) We enter devmgmt.msc. Field of what is pressed ENTER.

The connected device will most likely be in the list USB controllers or Other devices(and called " Unknown device»).

If it is in the list with other devices, and you are connected to the Internet, you can click on it right mouse and press the button. update Drivers.

If a unidentified devices there is still in the list USB controllers, then click on it right mouse button, and on the Driver tab, click the button roll out or Delete.

Another option, in the USB properties in the " Power management»Remove the tick from the point" Allow disconnecting this device to save power.».

You can also try for all devices that are in the list. USB controllers»Make the following:

Press Refresh Driver».

Press run the search for drivers on this computer.

Select the driver from the list of already installed drivers.

The list can be seen that there is a driver that is compatible with the device. Choose it and click " Further" A driver installation will occur, after which it is possible that the computer identifies the device.

In Windows 8.1. this problem meets with external hard drives and flash drives that work from uSB ports 3.0.

This problem is solved in the control packet parameters of the laptop power supply.

To do this go to the panel windows management In the Power Supply section, select the power scheme used and click "Change extra options Food. In USB parameters, it is necessary to prohibit the temporary shutdown of USB ports.