Where in the BIOS enable USB. How to disable or enable USB ports in Windows. USB connection configuration

Disable USB ports are recommended for precaution, namely when connecting flash drives, external disks or other USB devices in order to infect the computer with all sorts of viruses or data theges. It is for these reasons that many ITes in offices and companies block access to them. Without bothering some programs for these purposes or other settings, simply disconnect from the motherboard.

Next, I will give a few examples with descriptions, how to disable USB ports on your computer.

Disable USB in BIOS

We go to the BIOS, for this while on or reloading the PC press the Delete key on the keyboard. Go to the Advanced (Advanced Bios Features) section, where we are interested in the following option Legacy USB Support. By default, it has an enabled position change to disabled.

We save the modified values \u200b\u200bby pressing the F10 hot key and exit.

Through the registry

Using + R, open the "Run" window and enter the Windows REGEDIT command (without quotes). In the editor go on the branch

Microsoft Registry

HKEY_LOCAL_MACHINE \\ SYSTEM \\ CURRENTCONTROLSET \\ SERVICES \\ USBSTOR

We find the parameter DWORD "START" and change its value to "4".

Reboot, after pressing the "OK" button.

PS: How to enable USB ports? Re-change the value to "3".

Device Manager

Open the "Start" menu, right-click on the "Computer" click and go to Properties. In the left side of the screen, click on the "Device Manager" link. In the displayed list, looking for "USB controllers" open it and the mouse is deactivating.

Going to "Properties".

Then "Drivers" and then press the button shown in the screenshot below.

Deleting USB Controller Drivers

An option that also takes place to be. Just using the program, such as CCleaner, delete the driver from your computer. The reverse side is that when rebooting the PC will be checked for the presence of these and install them. What will again open access to ports.

Utility FIX IT.

You can download and at the same time how you can prohibit the tolerance using it, on this link //Support.microsoft.com/ru-ru/kb/823732.

Using programs

Applications are pretty - there is a lot, they do not list them, but on one I would like to become. Its name USB Ports Disabler. Download the link. We launch and then everything is intuitive.

First, press the button allocated in the figure below

Select the boot disk

In BIOS, it is better not to install the drive with the first boot device. Instead of a drive, specify a hard disk.

Most of the default PCs as a priority boot device exhibit a drive. This option for a couple of seconds slows down the PC boot, since it will check the presence of the boot floppy disk. No need to do this and because there is a danger to get infected with a loading virus with a "dirty" floppy disk. And do you often boot from a floppy disk at all? And why do you need this nasty sound of appeal to an empty drive? It is better to set a hard disk as the first boot device.

In BIOS Setup, there is a possibility to specify the devices that are bootable, as well as the order of their check. Let's look at how to remove the drive from the first boot device. To do this, select Advanced Bios Features, Boot Sequence, then select 1st Boot Device and change its value with FLOPPY on Hard Disk. In principle, the hard disk can be called HDD. As a result, the computer will be loaded immediately from the hard disk, bypassing the floppy disk. Of course, if necessary, the order order can always be restored by returning to the BIOS Setup.

But now, even if the computer does not try to load from the floppy disk, it will still check the drive when loading, losing time. To avoid checking the drive, set the Boot Up Floppy Seek option to Disabled.

Accelerate the boot of PC using BIOS

As you understand, it is important to accelerate the download that the PC does not check the extra devices, and loaded immediately from the hard disk. In addition, it is better to disable the search for new hard drives and other devices. If you do not often change the set of hard drives in the system, then set the zero search time. To do this, in the Main menu, place TimeOut value to 0.

How to enable USB 2.0 support in BIOS

USB: If you installed Windows XP along with Service Pack 2, then the USB 2.0 Controller option should be enabled.

On many motherboards, the USB Controllers option is set to USB 1.1 mode. This is due to the fact that Windows XP without packages of Service Pack (and special patches) does not support USB 2.0. That is why USB 2.0 is usually accessible manually.

To enable USB 2.0 in the BIOS Setup, set the option to Enabled (as shown in the illustration above) or in v1.1 + v2.0. But remember that to use the USB 2.0 interface, you need to install at least Service Pack 1 for Windows XP.

How to solve problems with USB devices with BIOS

Some flash keyfobs, MPZ players and USB drives are powered by the USB port. Equipment is not enough, then the device will not work. That is why you should make sure that the USB port provides enough power for such devices.

Check if you have an option called USB 2.0 HS Reference Voltage in your BIOS. If you are, then set the value with Low or Medium on high or maximum.

How to change the reaction of the PC to turn off the electricity in the BIOS?

In the Power Management BIOS SETUP section, you can specify how the computer will respond to turning off the electricity. The Power Loss Restart or Restore on AC Power Loss Restore ON AC Power Loss in BIOS is responsible for the behavior of the computer after an emergency shutdown of electricity and subsequent power recovery. Set this option to ON or ENABLED if you want the computer automatically loaded. Either off or disabled otherwise.

How to check the temperature and state of the PC via BIOS

BIOS provides information about the operating parameters of your PC. You can track real-time the status of vital system components, including CPU, fans, power supply and hard drives. For example, you can enable the alarm in the BIOS if the processor exceeds a certain temperature, or even implement an emergency shutdown. As a result, your system does not overheat.

Various items in the Health or H / W Control section allow you to track the change in voltages, as well as temperature sensors. In most BIOS, values \u200b\u200bare displayed for the temperature of the processor and the case, and in some versions and other temperatures, say, hard disk or motherboard chipset. In addition, the BIOS can be found the speed of rotation of the fans (in rpm).

How to eliminate with BIOS problems with coolers

If your PC is not loaded, it can be caused by too low the speed of rotation of the cooler or at all its stop. Especially often this situation is found with high-end coolers, whose speed of rotation depends on temperature. They can rotate very slowly (or even stop) at low temperatures, with the result that the BIOS may calculate that the fan has failed. In such cases, the correct BIOS configuration helps.

Place in the BIOS value of the CPU Fan Failure Warning option in Disabled. When you turn off this option, the computer will be loaded, even if the fan rotates at low speed. Of course, there is another problem: you may not enter the BIOS in general, because the computer may refuse to load the reason mentioned above (in many BIOS this option is set by default to Enabled). In this case, you will have to connect any cheap cooler to the motherboard to the motherboard, which always rotates at the maximum speed. And after turning off the setting, you can already connect a high-end model.

How to avoid collapse system

Modern hard drives can determine the symptoms or problems that precede the output of the drive out of order, warning about this BIOS. This feature is called Self Monitoring and Reporting Technology (SMART). Enabling the HDD Smart Capability feature allows the BIOS to send warnings to programs like Norton System Works or a well-known free Speedfan utility. As a result, the user receives information about the status of the drives. Such an opportunity allows you to take the necessary measures as soon as the first symptoms of the upcoming failure begin to appear.

Connect old printers and scanners (LPT)

Parallel port: the fastest mode is ESR + EPR.

The parallel port of the computer (LPT) usually works in only one direction. This setting is suitable for almost all devices, although the transfer rate is limited to 100 kbps. You can translate the LPT port to a more modern mode, which gives speed up to 1 Mbps.

To do this, enable ECR mode or ERR (Enhanced Parallel Port). In fact, you can include both modes at once, exhibiting the ECR / ERR option or ECR + EPR.

Warning: If you have several devices connected to one port, problems may arise with high-speed modes. In such situations, you can recommend purchasing a PCI extension map that will add the second LPT port. Either buy a USB-LPT adapter. Or, of course, go to a more modern scanner or printer.

This part of the section is addressed to the demanding users who wish to speed up the download time, optimize the parameters of the system, fully use the computational resources of the PC, the capabilities of the motherboard and memory chipset.

How to enable in BIOS output POST test results during boot

During PC download, many computers output multicolored manufacturers logos instead of POWER-ON SELF-TEST. But, as it seems to us, it will be much more useful to see which element of the computer is tested, and with what results.

In the Advanced BIOS Features section, find the Full Screen Logo Display item and set it in Disabled. After that, you can observe the results of all PC tests during loading.

How to set up BIOS so that PCs loaded even faster

With BIOS, you can even more reduce the time of the PC loading time by reducing the time of the first testing. Of course, we recommend that it is only if all PC components work stably. For example, you can turn on the BIOS to a single check of the available memory instead of three times. To do this, go to the Advanced or Advanced Bios Features section, find the Quick Power On Self Test or Quick Boot option and set it to Enabled.

How to enable another video card in the BIOS

If there are several interfaces in your computer to which a graphic card (built-in graphics, AGP, PCI Express, PCI) can be installed, the BIOS will try to determine how the working card is located in which of them. But it is not necessary, because all the necessary information is known to you!

Select an option called Init Display First to the BIOS setup, which can also be called Primary VGA BIOS or VGA BOOT FROM depending on the BIOS version. Specify the AGP value if you use the AGP graphics card. In systems with PCI Express, this option is commonly called PEG Port / Graphic Adapter Priority. In this case, set it into the PEG value if you use the PCI Express map.

How to enable and disable in the BIOS processor cache

The inclusion of the processor cache of any level (1.2 or 3) provides a considerable productivity gain.

The central processor works significantly faster than other components of the motherboard, and it often has to wait for data receipt. Accelerate data exchange allows a processor cache, which is a speed memory located between the CPU and the computer's operational memory.

The first-level cache (L1) is very small, but it is located on the core of the processor, close to computing blocks, providing a quickly affordable storage for temporary data. The second-level cache (L2) is significantly larger in size and can store some elements of the entire program or data pieces. When the processor requests data, it first checks their presence in the cache. If the required data in it is, then the performance of the computer is significantly increased, because the memory cannot respond at the same speed as the cache. Some processors are usually a professional level, and L3 cache is also present. As you understand, the cache should always be included.

How to enable the API on the BIOS

The chipset of the motherboard most often consists of two chips, which are called northern and southern bridges. They are responsible for sending data between the processor, rapid memory, expansion cards and peripheral devices. Enable APIC (Advanced Programmable Interrupt Controller) in the BIOS BIOS allows you to improve operations with devices. The number of interrupts increases from 16 to 24, and the management of them with APIC is much easier and more convenient.

All you need is to go to the Advanced Bios Features menu and set the APIC MODE option to Enabled.

How to enable Burst Mode in BIOS

BURST MODE allows you to speed up a lot: work with hard drives, PCI cards and RAM. A packet mode allows you to transfer several data pieces for one transmission instead of processing all pieces separately.

Warning: Many PCI cards may work incorrect if the PCI Dynamic Bursting option is exhibited in Enabled.

How to turn off in the BIOS built-in sound

Often the built-in sound controller of the motherboard is not used. Let's say if you installed a powerful PCI audio card or use the computer without columns. Then it makes sense to turn off the sound on the motherboard. In some cases, this makes it possible to increase overall systematic performance and stability.

In the Integrated Peripherals menu, set the value of the AU97 Audio SELECT item in Disabled (as shown in the illustration above).

How to turn off in the BIOS game port

The game port is useful only to the owners of old joysticks or to those users who apply it in the quality of the MIDI interface. Then it makes sense to allocate two input / output ports and interrupting the game port. (By the way, if you have a joystick, it is likely to use the USB connection.) All other users are better to turn off the game port.

In the Integrated Peripherals menu, set the value of the Game Port item in Disabled.

How to turn off in the BIOS network port

Some motherboards are equipped with two network interfaces, but, as a rule, most users need only one. Not working interfaces are better disconnected. In some cases, this increases the performance and stability of the system.

In the Integrated Peripherals menu, set out the value of the Onboard Intel Lan point in Disabled.

How to turn off in BIOS extra ports

Today, only the old PDAs and modems need serial ports of Som1 and COM2.

Disable ports saves two IRQ interrupts, reducing the number of interrupts that the processor must check. Yes, and the parallel interface of LPT today is unlikely to someone need. Especially since modern printers and scanners are connected to the USB port.

From the Integrated Peripherals menu, disable COM1 and COM2 interfaces (Option Yu Devices, Com-Port, but may be called Serial Port 1/2). Turn off the LPT port by setting the value of Parallel Port in Disabled.

How to turn off in BIOS FireWire (IEEE1394)

The FireWire interface is only needed in cases where you need to download video from the camcorder or connect the FireWire periphery. In all other situations, the interface is better turned off.

In the Integrated Peripherals menu, set out the value of the Onboard 1394 Device point in Disabled.

USB ports can stop functioning if the driver flies, the settings in the BIOS or the connectors received mechanical damage. The second case is often found at the owners of the newly purchased or collected computer, as well as those who decided to install an additional USB port in the motherboard or those who previously reset the BIOS settings.

The BIOS is divided into several versions and developers, therefore, in each of them the interface may differ significantly, but the functionality is mostly the same in the same way.

Option 1: AWARD BIOS

This is the most common developer of basic I / O systems with a standard interface. The instruction for it looks like this:

Option 2: PHOENIX-AWARD & AMI BIOS

BIOS versions from developers such as Phoenix-Award and AMI have similar functionality, so they will be discussed in one embodiment. Instructions for setting up USB ports in this case looks like this:

Option 3: UEFI interface

UEFI is a more modern BIOS analogue with a graphical interface and the possibility of control with the mouse, but in general, their functionality is very similar. The UEFI instruction will look like:

Connect USB ports will not be any difficulty, regardless of the BIOS version. After connecting them, you can connect a USB mouse and keyboard to a computer. If they were connected before, then their work will become more stable.

I welcome everyone again on the pages of your blog and today I want to tell how connect the COM USB port In Windows. Let's talk that it is and for what is used. I think for novice network administrators, and just for advanced users it will be interesting, for me, at one time it was just some kind of magic that allows you to configure server equipment.

What is connected via COM port

Through the COM port previously connected modems, mice. It is now used to connect with uninterruptible power sources, to communicate with hardware tools for the development of embedded computing systems, satellite receivers, cash registers, with devices of object security systems, as well as with many other devices.

Using the COM port, you can connect two computers using the so-called "zero-modem cable" (see below). Used from MS-DOS times to pump files from one computer to another, in UNIX for terminal access to another machine, and in Windows (even modern) - for the kernel level debugger.

But in the network world through COM portconnect to the cantilever port of network devices (switches, routers, brands such as Cisco or Juniper)

What is the circuit of connecting to switches through the serial port. There are adapters, for example, from St-Lab at one end of the USB which you connect to a computer, and the second is a COM port.

Installing COM Drivers USB Port in Windows

Unfortunately in Windows connected devices, USB to COM is not always automatically installed in the system, and you have to search for them drivers. If you bought it yourself, then the drive was included with the drivers, and you can use it if it is not, then look at how to find drivers.

Open the device manager in Windows. If you don't know how, then press CTR + Pause Breake, or press Win + R and enter Devmgmt.msc in the window. As you can see in the ports section (COM and LPT), I was found on the third COM port Unknown wire, and the drivers did not find for him from the system, which the yellow icon tells us.

Go to the properties of this device and select the equipment ID, you will have, something by type USB \\ Vid_067B & PID_2303 & REV_0300, here you are copying and searching in Google or Yandex.

After that, click the right click on the device in the device manager and select install the drivers, point to them and put if everything is OK, you will have a warning icon.