Why USB does not turn on. USB ports do not work - ways to solve the problem

On some computers when you connect hDD or uSB flash drive 3.0, an error appears "The device is not identified. " (USB Device Not Recognized) or " Windows stopped this device, as it reported on troubleshooting.(Code 43)"In Device Manager.

In this article, you will find instructions for eliminating the following problems:

• USB device is not recognized / not detected
• USB 3.0 flash drive is not identified / not detected
• USB 3.0 does not work on windows 7/10

How to fix: USB 3.0 port does not work on a computer

Before we proceed to eliminate this problem, you should try the following actions:

1. Use the other USB cableif you connect hard drive to port uSB computer 3.0.
2. Connect USB 3.0 to USB 2.0 port.
3. Remove the USB device, turn off the computer and disconnect the power cord (or battery if you use a laptop). Wait at least 2 minutes, and then connect the power cord again. Turn on the computer and connect the USB device again.
4. If you use Windows 7, Vista or XP, download and run the Microsoft Troubleshooter utility.
5. Reset BIOS to factory settings.

Solution 1. Disable fast launch function in Windows 8 and 10

Note: If option quickly launch It was already removed, check it out and restart the computer. After restarting, uncheck the checkbox and restart the computer again.

1. Reboota computer.

Solution 2. Disconnect USB Suspension Settings.

Solution 3. Restart USB 3.0 device.

1. Open device Manager. For this:

• Press the " Windows» + « R."To open the window" Execute.
• In the window " Perform"Enter: devmgmt.msc..
• Click ENTER.

2. In the Device Manager, expand "ControllersUSB» .

3. Right-click on " RootUSB-concentrator (USB 3.0 ) "And select" Delete.

4. Windows will automatically find and install the last drivers for your USB port 3.0.

Solution 4. Install the latest USB 3.0 drivers.

1. Load intel Driver Utilityor AMD drivers.
2. Launch driver Update Utilityand press " Further"on the first screen.
   
3. Take the license terms and click " Install.
   
4. Wait until the driver update utility is installed.
5. After the installation is complete, click " Run».
   
6. Click " Start scan ".
   
7. When the driver scan is completed, click " Download",to download latest versions Drivers for your computer.
   
8. Finally, click " Establish.
   
9. After completing the installation reboota computer.

Solution 5. Restore Windows to the previous working condition.

If the solutions above did not help with the problem when USB 3.0 does not work on the computer, you should try to restore the computer in the previous working condition. It is possible to do this if the earlier you activated the Windows Recovery Point.

Please write in the comments below, managed to solve the problem with a faulty USB 3.0 port, and what decision helped in your situation.

Sometimes there is a need to disable USB ports on a computer or laptop to limit access to connect flash drives, hard disks and other USB devices. Disable USB ports help prevent connection of any drives that can be used to theft important information or to cause a computer infection with a virus and spread malicious software On the local network.

USB access restriction

Consider 7 waysWith which you can block USB ports:

1. Disable USB through the BIOS settings
2. Changing the registry settings for USB devices
3. Disable USB ports in Device Manager
4. USB Controller Drivers Uninstallation
5. Use Microsoft Fix IT 50061
6. Using additional programs
7. Physical shutdown USB ports

1. Disable USB ports through BIOS settings

1. Enter B. bIOS settings.
2. Disconnect all items associated with USB controller (for example, USB Controller or Legacy USB Support).
3. After you have done these changes, you need to save the settings and exit BIOS. This is usually done using the key. F10..
4. Restart your computer and make sure that USB ports are disabled.

2. Enable and disable USB drives using the registry editor

If you do not fit through the BIOS, you can close access directly to the Windows OS itself using the registry.

The instruction below allows you to close access for various USB drives (for example, flash drives), but other devices, such as keyboards, mice, printers, scanners will still work.

1. Open the Start menu -\u003e Run, enter the command " regedit."And click OK to open the registry editor.
2. Go to the next section
   

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

3. On the right side of the window, find the item " Start."And double-click on it to edit. Enter value " 4 »To block access to USB drives. Accordingly, if you enter again the value " 3 "Access will be open again.

Click the "OK" button, close the registry editor and restart the computer.

The method described above only when installed driver USB controller. If for security reasons, the driver has not been installed, the "Start" parameter value can be automatically reset to "3" when the user connects the USB and Windows drive will install the driver.

3. Disconnect USB ports in Device Manager

1. Right-click on the icon " A computer"And choose in context menu Item "Properties". A window will open in the left part of which you need to click on the link " Device Manager».
2. In the device dispatcher tree, find item " USB controllers"And open it.
3. Disconnect controllers by pressing the right mouse button and select the "Disable" menu item.

This method does not always work. In the example shown in the figure above, the disconnection of the controllers (2 first items) did not lead to the desired result. Disabling the 3rd point (USB storage device) worked, but it makes it possible to disable only a separate USB drive instance.

4. Deleting USB Controller Drivers

As an option for disconnecting ports, you can simply uninstall uSB driver Controller. But the disadvantage of this method is that when you connect the USB drive, Windows will check the availability of drivers and in absence to install the driver. This in turn will open access to the USB device.

5. Bans User Connecting USB storage devices using Microsoft Applications

Another way to prohibit access to USB drives is the use of Microsoft Fix IT 50061 (http://support.microsoft.com/kb/823732/en - the link can be opened near Mitutu). The essence of this method is that 2 conditions for solving the problem are considered:

• USB drive has not yet been installed on a computer
• The USB device is already connected to the computer.

As part of this article, we will not consider this method in detail, especially since you can study it in detail on the Microsoft website using the reference above.

Should still be taken into account this method Suitable not for all versions of Windows.

6. Using programs for disconnecting / enable access to USB storage devices

There are many programs to install access to USB ports. Consider one of them - the program USB DRIVE DISABLER.

The program has a simple set of settings that allow you to prohibit / allow access to certain drives. Also, USB Drive Disabler allows you to configure alerts and access levels.

7. Disable USB from the motherboard

Although the physical shutdown of USB ports on the motherboard is a practically impossible task, you can turn off the ports on the front or top of the computer case, disconnecting the cable going to the motherboard. This method will not fully close access to USB ports, but will reduce the likelihood of using the drives in inexperienced users and those who will simply be lazy to connect devices to the rear. system Block.

! Addition

Prohibition of access to removable media via Group Policy Editor

In modern windows versions It is possible to restrict access to removable storage devices (USB drives including) using the Local Editor group Policy.

1. Launch gpedit.msc.through the "Run" window (Win + R).
2. Go to the next branch " Computer Configuration -\u003e Administrative Templates -\u003e System -\u003e Access to Removable Storage Devices»
3. On the right side of the screen, find the item " Removable discs: Prevent reading. "
4. Activate this parameter ("Enable" position).

This section of the local group policy allows you to configure read, recording and execution for different classes of removable media.

The emergence of problems with non-working USB ports is not such a rare phenomenon. And considering that half of modern peripheral equipment Connects through this connector, it is practically a catastrophe for a user.

However, it is initially necessary to understand that not functioning connectors on a computer, or not working USB outputs on a laptop - two distinguishable problems solved by different paths.

Simple solutions to the problem of non-working ports

All equipment works, interacting with the operating system through the corresponding algorithm - driver. It is possible that the slots do not function precisely because of the occurrence of failures in these programs. How can I try to eliminate the problem?

• Restarting a computer. Most often no causes for panic. Failure in the program can be eliminated by simply restarting the computer. In the absence of problems with loading drivers, restarting the system will improve functioning.
• Refresh configurations USB connectors In device manager. Nothing difficult, you need to click "My Computer", then the "Management" item (or in the "Start" to dial DevmGMT.msc command). In the window that appears, click on the list of devices and select the point at the top, and then to "update the configuration of the equipment". After that - to control whether the "USB controllers" inscription will appear in the list of equipment, if it can be considered closed.

Also, it is also quite common to problems with the functionality of the ports after updating the software on Windows 10. If this is so, it is necessary to double-check whether all the developers have been installed.

Set the reasons for a power failure and solutions

If you occur in the operation of USB connectors on the computer, you need to hold a number of actions and establish the causes of the problem to know exactly how this situation is allowed.

• The computer system block has universal tires in front of the panel and rear. If you refuse to work in front, the most probable reason - mechanical breakdown.
• Also a possible secret to the failure of the USB function, may be an incorrect connection of the USB block to the motherboard. For this, 4 wires are used (2 nutrition, and 2 signal). It is worth checking them, it is possible on the nutrition of the poles are confused, and the signal is installed with a sequence violation.

In such a situation, check the performance of the connectors by connecting the serviceable memory card (flash drives) to the ports located behind the system unit. Installing workable equipment in the front outputs is prohibited, since the flash drive burns with a torrential polarity! In case the rear USB slots work, and the front no, the diagnosis is the violation of the front panel of the connectors, or the exit itself is broken, or the ports block to the motherboard are inconsistently connected.

To clarify, it is worth disconnecting the system unit from the power supply and remove the protective covers from it. You need to compare the scheme of the correct sequential connection with the situation on the computer.

Attention!

- Connection sequence circuits may differ depending on the motherboard.

- It is found so-called reverse connection, horizontal and vertical.

- When inspection, you need to focus on the colors of contacts and pads, as well as the ratios of their coloring and the location of metal pins.

• If after the inspection of the correctness of the connection is not established violations, it is worth looking at the slots themselves. They are painted black or blue. In the last version, if the memory card does not work in it, then the cause of the malfunction may be hidden in the following:

Blue is labeled USB output version 3.0. With all its merits (power, speed), it has one drawback - after reinstalling the software for its normal operation, you need to install the drivers. Either "demolish" the old and reinstall. Clarify specifically, you can connect the flash drive in the black connector. If it works, then the reason in the driver to the USB port 3.0 and best in this case download software from the manufacturer's website. Or, as a last resort, do it using the program from the configuration of the motherboard.

• A situation is also possible when both ports "do not see" installed equipment. In this embodiment, the reason is hidden in the refusal of the controller. Exit - buying additional equipment, or rather the USB2.0-PCI or USB3.0-mini PCIE extension board. Repair specifically controller is economically inexpedient.

USB2.0 and USB3.0 boards are different by price and functionality.. The first version 2.0 is cheaper, but also the speed of the device below. The main problem is that the device is suitable for systemic blocks of old models, and it is not always possible to mount them into new equipment having motherboard Microatx.

But the option 3.0 is more powerful, speed, but also costs more. However, the equipment cannot be installed in old system blocks.

These are the main work on identifying and troubleshooting in the USB port block on a stationary computer.

Liquidation of problems on a laptop

The diagnosis of problems on the laptop is also simple, as on the computer, however, the repair requires experience and special knowledge.

In case of a failure of USB ports on a laptop, the diagnosis of reasons is best to start after reinstalling windows systems, in particular, if it is 10 version. The whole reason is possible in the incomplete installation of drivers.

So, it is possible to identify the cause by checking the black and blue slots. The sequence is the same as for stationary computer. Insert the external medium alternately into the blue and black port. With the non-working USB 3.0 (blue) and functioning 2.0 (black), we conclude the need to install or reinstall the driver.

In a situation where software solutions Not corrected the problem, the chance remains that the equipment is disabled in the BIOS. You need to try to enable.

The algorithm is next, reboot the laptop and when you start it, press the F - 2 or F-12 key. BIOS opens. Next, approximately the following:

• At the top we find the item Advanced. And in the open list (usually at the end) - USB Configuration. Press Enter and go to the section.
• Find a USB FUNCTION item and in front of it exhibit.

On various models, the BIOS may differ, but the principle of operation is similar.

However, if it did not help, then most likely the causes are hidden in mechanical breakdowns or closures in the equipment. Then the only option remains service centerwhere, or replace the faulty items or will be fixed.

Hello, dear readers! Each time, when starting a computer, initializing all devices installed on the computer are initialized, data on drivers and various utilities are read. But sometimes the moment occurs when the device connected to personal computeris not determined by the operating system.

It is at this point that we have anxious moment comes, and we wonder: why does not workUSBport? What is the actual matter and what needs to be done to make the port earn? As a result, as they say, there is a way out. But first let's see how everything is arranged and what is the essence of this material.

So, many of us when working at the computer use USB-port constantly, as if without it, it is impossible to do without it, although in fact it is so. In computers, as you know, USB ports are present not only on the front panel, but they can be noticed on the front panel of the system unit housing, for example in the card reader.

So now the USB port is the heart of the system, so to speak, the exchange of information that can be transferred at any time to the PC system available at that time. I already silent about the fact that with the help of ports it is possible to enter the data into the computer (mouse, keyboard). The location of the ports on a personal PC is always different, it is worth adding that in advanced systems, game platforms, additional USB ports are installed.

As always, as it usually happens, one day there is a moment when the USB port does not work, that is, simply, the USB port hangs, it is buggy, it is not determined by the system, more precisely, it works incorrectly. I suggest you in today's article to consider the reasons, as well as ways to eliminate the disabled USB port.

We ask the question why the USB port does not work?

FirstlyIf the port is not entirely correct or otherwise connected to a flash drive to a computer or other equipment connected to a computer, is not determined by the system at all, then in this case you should make sure that the controller on the motherboard PC is included .

Quite often users forget about the turn on the USB controller. It seems to be a simple, but still a common problem, when the user launched a PC, and the device was not determined. Here it is possible to fix everything, for this you need to go to the BIOS and include the appropriate parameter. By the way if you do not know what BIOS is, I recommend you to read the article.

So, go to BIOS Find there Item "Integrated Peripherals - It concerns in Award BIOS", or in Ami Bios. - Advanced. "

Next, click "Enter" and go to "Onboard Devices Configuration" and see the "USB Function" and "USB 2.0 Controller" items, were in the "Enabled" position. If everything is the case, it means everything is included. Otherwise, the parameter can be filled (OFF), the position "disabled". If the option is turned off, then it should be turned on. Next, we save the changes, then reboot the PC system and check the working capacity of the USB port. Be sure to check whether the USB ports are connected on the front panel of the system unit to the motherboard itself with the help of the so-called block.

If the port never earned, then moving on.

Secondly, Maybe it's about the inoperability of the port and is hidden at all in the USB cable extension? For example, there are such situations when the computer does not recognize the peripheral device (printer), for the simple reason that the USB cable itself is simply damaged. The reason for the cable damage can be the most diverse, for example, you accidentally put a chair on a cable or some difficult thing and simply simply changed it. Therefore, do not be lazy to check the cable itself.

Thirdly, it is quite rare to encounter such a problem when the USB port lacks food. I will give you a specific example. Imagine that to the front of the system unit housing in a USB connector, you connected the USB flash drive and printer. As a result, the operating system when sending data to print, tells us that the document failed to print. In general, your computer simply does not see the printer. And if you restart the computer, the printer is determined by the system, and you can easily print a document. However, after a while, the computer again loses the connection to the printer and the printer does not print. Do you know why?

Such, it would seem, at first glance, a banal problem is related to the fact that there is a shortage of power for the USB port. As a result, the USB port refuses to function properly. Mostly such a casus associated with a lack of food occurs when connecting multiple devices to the front panel of USB ports.

Of course, it is not always, but still there are such situations. These USB ports are connected to the motherboard using a cable. This cable in addition to data transfer, in addition, the USB of the hubs themselves is supplied. It is possible that the power supplied at the same time by two devices connected to the USB hub may not be enough. In this case, I can recommend to connect the printer to the built-in USB port, which is located on the PC motherboard.

You can also change the CMOS battery on the board. It happens that the problem completely disappears after replacing the battery on the motherboard. What is this battery and where it is, you can find out in this article:

In general, if you have does not workUSB portwhich is located on the front panel of the system unit housing, then try to replace the USB hub itself. Who knows, perhaps it is he is defective.

You can also try to stick the cable to another USB connector on the motherboard.

FourthIf still failed the USB port controller, which is responsible for the definition and launch of the device itself, then things, of course, are bad. There are, of course, the opportunity to take and turn off the controller itself on the motherboard, but it takes time to it, you need to have a controller himself, and, of course, the soldering station itself. From the point of view of time costs, not quite appropriate. Another option is to trust the specialists, the truth here also has its own underwater stones, the price, quality of work, as well as the competence of a specialist who works specifically on this problem.

Fifth, peripherals I. mobile devices may not be recognized on your computer due to lack of drivers and special software. The fact that if you use your operating system already sufficiently long time and the system has not been updated at all, and in general the Windows assembly is not the original version, then in this case there's a place that the drivers are considered already outdated and therefore in the system Constantly happened.

Sometimes Windows generally disables the USB hub in energy saving purposes. That the USB device is not disconnected, you will need to do the following.

Open the Device Manager, by right-clicking on the "Computer" label by selecting "Properties".

After the device manager window opened, you should double-click the mouse button on "USB controllers" by the left button, reveal the branch.

Now you have to go to the root USB hub and in the "Power Management" section, remove the tick, as shown in the figure below.

At sixth, sometimes reinstalling operating system helps to eliminate the problem when does not workUSB port.Although, of course, first try to roll back the system in previous Condition. Here is an article in which you will learn how to do it:

V-seventhmaybe there is some kind of faulty equipment in your system, which is just the same and serves an obstacle to the normal operation of the USB port.

This problem is very relevant in our time. After all, quite often users directly face it. So there is a solution. USB ports can hang in the computer, clinging contacts, and many more additional problems can occur when working at a computer.

We find a way out of our situation, check all devices for connecting and shutdown. You will need to disable all devices and connect one by one, for example, you first connected the keyboard first and see if it works, then you connect the next device, let it be a mouse and so on. Connect additional USB devices if you do not work, then the problem is solved or you need to search in peripheral devicesmaybe it closes there, and you never know.

In eighth, I generally forgot to enable the serial bus controller in the device manager. There are times when you do not pay attention to the work of USB devices, turned on the computer, downloaded music, listen and you enjoy new works of art. True, everything comes unexpectedly, suddenly needed a USB device, and then silence, it does not work. Everyone comes to mind, maybe the controller is not included, let's take and check and there.

In each PC, there is a device manager that shows which devices are connected, whether the drivers are installed and updates are made.

In general, I think that you probably already know that in the absence of any driver, the system automatically marks it with a yellow exclamation mark, it means a malfunction, as a result, when two mouse clicks, open the optional window here, code information is displayed. Faults and capabilities of its recovery.

V-ninthif all the above methods did not give positive result, then I recommend that you install a USB PC controller on the motherboard.

If a low-power supply unit is installed on your computer, for example, 300 W, it is likely that the reason for all the troubles is hidden in it, install the power supply in power, say 500 W and check whether the USB port earned.

By completing today's article, I would like to say that it is not always possible to easily find the culprit of all problems, sometimes it is not enough just to reinstall Windows to find out what happened in fact.

If there are no drivers for serial tire controllers and the controllers themselves are marked with an exclamation mark, in this case, or install the drivers for the controller, or you can delete all controllers and restart the computer. After downloading the computer, the system will try again to install them, and perhaps all USB ports may again work properly.

So, the summary of today's article can only be noted that if the USB port does not work on the computer, then the reason for all the troubles can be enclosed both in hardware and in software stuffing. In general, everything I wanted to tell you today, I said.

How do you need today and what can you add to everything above what? In the next issue, you will learn \u003d\u003e

These are universal computer connectors for connecting almost any devices, ranging from mouse and ending with smartphones and printers. When one and more of the ySB ports stop working, it creates certain problems, especially to laptop users. After all, in laptops, the number of USB ports is strongly limited (especially in cheap laptops, where we often make only 2 USB).

The reasons for which the USB port may not work

In order to understand the current problem, you need to clarify a few moments, namely:

• We are talking about a computer or laptop
• Which of the USB connectors does not work (all, on the computer case, only).
• After that, USB stopped working (reinstalling Windows, influence water, physical impact).

Let's start with simple and banal. If the USB connector of your computer or laptop stopped working after you hit it, poured with water or dropped, then, most likely it is damaged at the physical level and at home it is hardly possible to repair it. It may be necessary to replace the connector itself or its plume.

When diagnosing a USB fault, you must first make it visual inspection. This is how the inlet is broken inside the Yusb, in which the contact legs can be shortened.

Left broken USB, right working

In this case, all USBs may not work and even. It will only help the connector replacement or if it is the front USB of the stationary computer case, then they can be.

You can also try to break the shortened legs.

If the external state of the connectors does not cause suspicion, it is worth checking the BIOS settings. Perhaps USB is disabled.

Now we will analyze the situation with the disabled USB 3.0 connector.

What is the difference between USB 3.0 from the usual USB connector?

First of all, in color. USB 3.0 inside blue or sometimes orange, and ordinary usb. Black or white.

Visual difference USB 2.0 from USB 3.0

If only USB 3.0 ports do not work, then with the most likely a problem with drivers, or rather with their absence. To check this option, Enough to go to the Device Manager.

To do this, click right-click on the icon "" and select "Computer Management".

Computer Management

In the window that opens, on the left at the top we click on the Device Manager.

Device Manager

A list of all computer devices (laptop) will open among which there should be no exclamation mark.

Missing USB driver

Should be like that

If a exclamation signs on the uSB devices In the device manager there, it means you need to put the driver. To do this, or if this is a computer, then download the driver from the manufacturer's official website.

This situation often occurs after reinstalling Windows.

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