What is Unknown Device and how to fix it? Using a USB hub.

This is probably one of the most annoying and common error codes that Windows can report. Well, also error 43 should be attributed to the category of universal ones, because it is associated with any computer hardware devices, and they, in turn, may not work.

Error code 43 reports not recognizing: USB ports, hard drive, video card or any other equipment connected to the computer.

Typically, the error message contains the following text: The device has been stopped because it has reported problems. (Code 43) ".

If you open the "Device Manager" and view the properties of the equipment that received this error, then the following picture is observed in the "General" section:

Causes of error 43

In 90% of cases, error code 43 is associated with device drivers, which in turn can be damaged by the most different ways(for example, viruses). In the remaining 10%, the hardware device is out of order and needs to be replaced or repaired.

Sometimes this error can be solved by simply restarting the computer, cleaning (using specialized software) or “rolling back” (restoring) Windows 7, 8 or 10. But believe me, this will only help temporarily - literally in a day, week or month, error code 43 will return again.

Fixing Error Code 43

First way

This method is absolutely safe and will save you time.

Among the best programs, for automatic update drivers, I would single out the following:

• Driver Pack Solution
• driver booster
• Device Doctor
• Driver Genius

Second way

This method is suitable for more advanced computer users. Yes, and it is much more interesting, because you will need to dig a little into the system.

So, to fix error code 43 manually, you need to:

1. Remove the current driver:

We launch the Run dialog box using the Start menu or using the Win + R key combination.

In the open line, enter the following phrase sysdm.cpl and press OK or the Enter button.

2. Find a new driver

After you remove the old driver, you need to find a similar one, only a newer one. To do this, you can visit the device manufacturer's website and search its pages for special section where the drivers are located.

3. Download the driver

Download the driver and save it to your computer. Most likely it will be a ZIP compressed .exe file or RAR archivers.

4. Install the driver

Unzip the downloaded .zip (or .rar) file and run the installer.

5. Reboot the computer

If you uninstalled the old device driver and installed a new one in its place, this should solve your communication problem between operating system and equipment.

V otherwise, I recommend that you remove the failed device from your computer and try connecting it to another PC to test if it works properly. By resorting to this method, you may save money and just try to look for new drivers or even reinstall the operating system.

If on the other Windows computer gives error 43, then there is nothing to be done - you will have to purchase a replacement for the damaged device.

Sometimes this happens: you work quietly at your computer, when suddenly some incomprehensible sign pops up and informs you that something is wrong with your “workhorse”. At first, this can be scary, but, if you look, not all messages about are as scary as we think. In addition, most of them are quite capable of fixing their own hands. The main thing is to understand what happened. The error code (43, for example) will help you figure this out. So what does this mean? This suggests that your video card is to blame for the problems that have arisen. Error code 43 can also indicate problems with USB, but in most cases such a plate appears when the video card drivers fail. What to do with it? Read below.

Error code 43: Video card failure

It happens that the drivers on the video card fly off, and it becomes simply impossible to install them again. In this case, you need to turn to the "Task Manager". Most likely, the video card icon will be marked with a yellow icon with and in the detailed properties you can find the following: “This device has been stopped because it has reported problems. (Error code 43)." in different Windows versions the message may be different, but the essence will always be the same: a failure in the operation of the video card.

Error - how to fix?

To solve this problem, you can try to reinstall your operating system, and then reinstall the drivers for the video card and other devices that need them. This procedure may help. But, since basically error code 43 means that the BIOS of the video card itself was found, but installing drivers is not possible due to incorrect operation of the GPU chip (this happens in the event of chip degradation or soldering on the chip), then other measures may be needed.

You can heat the chip with a special soldering iron. This will help reactivate contacts that may have disconnected. Quite an extreme option - to try to "bake" the video card in the oven. Such an attempt, of course, is fraught with overheating of the board and its complete failure, but if you are successful, you can save on repairs. If you are not confident in your abilities and do not want to take risks, then you can always take the computer to service center where the professionals will take care of it.

Those who ventured to subject their video card to “culinary” processing should remember that the service life of the device after such a procedure rarely exceeds 2 months. After that, it either goes out again, or breaks down completely. In addition, after baking warranty service no longer applies to this video card.

However, back to the problem itself. Most often, owners of 8xxx or 9xxx series cards from the manufacturer nVidia face it. An error (code 43) may also occur when using video cards of any other brands and lines.

Note

In order to be 100% sure that the reason lies precisely in the card itself, it is better to rearrange it and test it on another computer. In rare cases, error code 43 can also appear with problems with the operating system, related equipment drivers, and so on.

Alternative plot development

You bought a new video card, tested it at the place of purchase, it worked fine, but when you tried to install it on your computer, an error with code 43 was displayed. The card itself is detected, but refuses to show signs of life in every possible way. What to do in this case? What is the problem?

First, check BIOS settings. Very often, the "legs" of all problems grow precisely from its incorrect settings. To check for conflicts in the system, you need to turn off all unnecessary, and then the necessary components one by one, so you can identify the problem. If you don't trust some hardware, you can also test it on another machine.

Secondly, if another card was installed in your computer before, you should first remove all its drivers, as they can also interfere with the correct functioning of the device.

Thirdly, it also happens that the Memory Hole Remapping option is actually to blame for the error with code 43. And when you turn it on, there is a conflict with the drivers, which disables the video card.

And it also happens that such a problem has nothing to do with the internal components of the computer. If you have a new and working video card, error code 43 may indicate problems with USB.

Problems with external devices

In fact, error code 43 (Unknown Device) is one of the most common problems that can occur. Such a failure often occurs when connecting a video card or a printer, phone, etc. via a USB interface. It happens on all operating systems. Windows line. If you have such a problem, be aware that the "Device Manager" stopped the work of a particular component, because it detected an error in performing the prescribed functions. Problems like these are always hardware related. Windows Tools. In rare cases, this indicates errors of a different kind, for example, an incorrectly specified path to the driver.

How can I fix error 43 when connecting USB

The easiest thing to do if the situation occurs is to unplug the cable and restart the computer. There is a possibility that this was only a temporary hardware problem that will disappear by itself when you restart the operating system. Sometimes additional measures may be necessary, such as completely disconnecting the power of the computer or removing the laptop battery for a few minutes. After that, everything returns to its place.

USB error (code 43) sometimes occurs when the user changes something in the registry. In this case, you need to cancel all last changes and restart your computer. You can delete the entered data that affects the configuration of the connected device. You can also roll back to more early version driver or restore the system, which will automatically undo all the changes made, returning to the "default" settings.

The problem can also be solved in the process of installing the driver for the equipment itself. If the USB device reports an error, then you need to delete the following connections in the "Manager": mass storage device, USB Root Hub and USB Host Controller. It is important to remember that reinstalling the driver implies it complete removal and redoing a full installation, although sometimes simply updating an outdated version is sufficient. This will help if the driver was installed incorrectly or damaged.

Other Ways to Fix Error 43

In order to restore the operation of the USB device, you can reinstall the operating system itself. Windows package may contain the necessary files that will provide normal functioning computer. You can also try updating the BIOS itself.

Mistakes external devices(USB or FireWire) may occur due to problems with the cable or connector, to check the correct operation of which you should connect them to another computer or laptop. If the error appears on another machine, these elements should be replaced with working ones.

There are situations when modern USB devices need to be more energy than a computer can provide. To solve this problem, you should buy a transitional USB Hub and make connections through it.

The last two, but no less common reasons are incompatibility between the device and the operating system and problems with the switch itself (marriage, breakdown). In both cases, only replacing the old USB equipment with a new one, but working and compatible with the OS, will help.

Conclusion

Remember that sometimes the error may not be related to hardware devices. In this case, you must either repair or reinstall Windows itself. Some helpful tips by solving error 43, an inquisitive user can always find it in the Troubleshooting Reference Guide.

None of us is immune from the fact that at one point the Windows 10 operating system will give a video card error with code 43 on your laptop or computer. Moreover, usually it does not depend on the model and manufacturer - a failure can occur both on nvidia graphics card, so on AMD Radeon. In this case, in the device manager of the system, the video adapter will display an icon in the form of a yellow triangle with exclamation mark, and the following will be written in the properties of the device:
"This device has been stopped because it has reported a problem (code 43)."

In the English version, the error looks like this:
"Windows has stopped this device because it has reported problems. (Code 43)."

The reasons for the appearance of such a situation can be several factors: a short-term failure of the operation of the operating room Windows systems 10, garbage or broken registry keys, problems with the device driver and even a possible conflict with RAM.

How to troubleshoot device code 43

Step 1. To eliminate the usual simple failure of Windows 10, which also takes place, you must first simply turn off your computer or laptop, and then unplug the power cord from the outlet. If you have a laptop, disconnect the battery. After 15 minutes, plug everything back in and turn on the device. Didn't help and error 43 on AMD or NVidia reappears? We are trying to clean up the system.

Step 2. Let's try to clean the Windows 10 registry from various garbage, which often causes it to malfunction. And the excellent utility CCleaner will help us in this difficult work. For our purposes, its free FREE version is quite suitable.

Run the utility and open the "Registry" section. First, we start the analysis by pressing the "Search for problems" button. We are waiting for the analysis to complete and all the problems found will be shown. Click on the "Fix" button. After that, we reboot and check whether the Code 43 problem was resolved or not.

Step 3. Windows Rollback. Another method that often helps out in case of various problems in Windows 10 is system restore to the previous one, when the video adapter worked without problems.

Step 4. Reinstalling and updating the video card driver. Do not forget that the video card driver could also be twisted and started to fail, and therefore it is worth trying to update it to the most latest version. You can download drivers for NVidia, for AMD Radeon -. Downloading installation package and start.
If suddenly the software did not install automatically, we will try to update manually. To do this, open the Windows Device Manager, find the section "Display adapters":

Right-click on your Nvidia, AMD Radeon or other video card and select "Update Drivers" from the menu that opens. Now you need to specify the path to the device driver, after which it will be updated.

Step 5. The reason for the problem with code 43 for the video card may be that there is not enough RAM. Often this trick helps to solve this problem! You need to open the “Control Panel” of Windows and go to the “System and Security”>> “Administrative Tools” section.
In the window that opens, double-click on the “System Configuration” item to open the following window:

Here you need to go to the "Download" tab and the "Advanced Options" button.

Another window will appear in which you need to check the "Maximum memory" box and click on the "OK" button.
We restart the computer or laptop again and check whether error 43 is issued by the video driver or not.

Step 6. The last option that can help in fixing a device problem is RAM shamanism.
Turn off the power system block and unscrew the lid. We pull out all the memory sticks except for one. The main thing is that it should be no more than 2 GB in size.

Turn on the PC and check. Has the problem code 43 of the video card disappeared? Turn off the computer again, add another bar and check. if the error disappears, then turn off the computer and add more, and so on until the error appears again. The problem is most likely in the last inserted module. To be sure, pull out the one that turned on the very first and look at the result.

P.S.: If none of the proposed methods helped, then the cause is most likely a breakdown of the video card and you need to give it for diagnostics. At least try to turn it on with friends or relatives and check there.

After reinstalling the operating system, you must install drivers for all equipment. This provides stable and fast work hardware. But there are cases when, after unpacking the utilities, some devices were not identified and report an error: "This device has been stopped because it reported a problem (code 43)". Therefore, let's look at everything about Unknown Device: what it is and how to fix it.

What is Unknown Device?

An Unknown Device is a device connected to the computer, the drivers for which are not installed or are damaged. It can be a video card, an audio chip, or connection ports. Moreover, in some cases, the device can work despite the occurrence of an error, although it is slow and unstable.

Some pay no attention to this problem. But if the video card is an unknown device, you won’t play demanding games, if the WiFi module, you will lose wireless Internet, and if the audio chip, get ready to listen to music only on your phone. Therefore, it is imperative to identify the computer component and fix the problem.

Causes

It all depends on several factors. Let's analyze all the possible prerequisites for the appearance of an error:

• incompatibility of drivers and OS;
• infection of the system with viruses;
• incorrect BIOS settings;
• damage to driver files due to system errors;
• physical damage to the device or connection cable.

Ways to fix

There are many life hacks to restore the working state of the device. But not every method will be equally effective in your situation. Therefore, we divide the methods into two groups and sort them according to the probability of occurrence.

Basic ways

In 80% of cases, the instructions below will fix the unknown device error.

Driver installation

If you have recently reinstalled Windows and standard drivers did not fit one of the devices, it is worth considering a separate installation. For this:

Attention! Download files only from the official websites of the equipment manufacturer! Alternatively, use the trusted DriverPack Solution application.

Rollback to the previous driver or its removal

If your system is not fresh and you have not previously observed the Unknown Device, then:

1. Go to "This PC" - "System Properties" - "Device Manager".
2. Find the Unknown Device, open Properties, and click the Roll Back button.

Reverting to a previous hardware configuration may resolve the issue. If unsuccessful, uninstall the driver and repeat the instruction from the previous subheading.

Virus software check

Malicious programs can damage or remove system files including drivers. Therefore, Unknown Device may be the most innocuous consequence imaginable. For Windows checks need to:

If no viruses were found or their removal did not solve the problem with the Unknown Device, proceed to alternative methods.

Alternative ways

The following methods help to solve the problem in exceptional situations.

Installing system updates

Automatically updated drivers are a very good thing. But at the same time, the Center must also work. windows updates, because sometimes there is a version conflict leading to crashes.

To do this, go to "Control Panel" - "Windows Update" and turn on automatic search and installation of updates from Microsoft.

Using a USB hub

If it turns out that Unknown Device appears when USB connection devices worth considering USB hub with separate meals. The point is that for modern mobile devices(portable hard drives, 3G modems, WiFi modules, etc.) requires more power than conventional flash drives. Outdated models of laptops, netbooks and even computers do not have the necessary current and / or voltage at the output.

Cleaning the system

The accumulation of system debris and erroneous keys in the registry adversely affects the operation of the computer. A symptom of this is also the appearance of an Unknown Device.

To clean the system you need:

Replacement of connection loops and cables

Weak contact, breakage of wires and cables, burnout of loops or banal dust pollution can cause a problem with device “recognition”. Check the USB connectors and do a "spring cleaning" inside the laptop or computer system unit. Pay special attention to the motherboard.

Attention! With insufficient experience, do not disassemble the computer yourself, you may damage it.

BIOS update and setup

In exceptional situations, "code 43" causes incorrect settings or outdated BIOS version. Perhaps you have one of the connectors on the motherboard software disabled or the automatic enable mode is set, which leads to Unknown Device.

To update basic system I/O check out the article.

On this I conclude. If none of the methods helped you, write in the comments, we will try to fix it together. After all, such an error as Unknown Device can be solved independently, without contacting a service center.

The USB interface is the main one in any modern computer. With it, we connect almost all peripheral devices to a PC or laptop.

Thanks to modern technologies in the vast majority of cases, this does not cause any problems. However, sometimes errors can occur, and usually at the most inopportune times.

And within the framework of this article, one of the most common errors when connecting USB devices to a Windows system is described and methods for resolving this problem.

Why does usb error code 43 occur on windows 7?

Error 43 is one of the errors that can occur when connecting USB devices to a computer running OC Windows. This displays a dialog box indicating the device that has the problem, as well as a description of the error.

There can be several reasons for the problem:

• Technical malfunction of the connected device or USB port.
• Uninstalled or incorrectly working software (driver).
• Temporary hardware or operating system problems.

This error can occur with any computer component, but most often it appears when connecting video cards and USB devices such as printers, scanners, smartphones, webcams, etc.

How to fix error code 43 unknown device on windows 7?

There are several ways to resolve this error. As you may have guessed, they depend on the cause of its occurrence.

In general, when a problem occurs, you should do the following:

1. Restart your computer.

Often the failure is caused by a temporary problem in the hardware or in its driver and will be fixed after a reboot. It should be taken into account that when rebooting, it is necessary to completely disconnect the machine from the network (in the case of a laptop, also remove the battery), and then turn it on again.

This will provide full reset voltage from all components motherboard, including USB interfaces and their controllers.

2. Replace the USB cable connecting the computer to the device.

Often problems are associated with a damaged wire. Also try using a different USB port.

It should be borne in mind that many devices - in particular such as external rigid disks - quite a lot of current is required for normal operation. Try connecting your device with via USB hub with external power supply.

3. If after the previous steps the error repeats, then try to remember whether you have installed or updated the hardware components of the computer, or its software.

If yes, then it is quite possible that the latest changes in the system are the cause of the failures. In this case, you should remove installed equipment, roll back updates, or use the built-in Windows system restore utility.

4. One more common cause failures are problems that occur in software drivers.

Completely uninstall the driver of the failed device and reinstall it. To uninstall the driver, go to Device Manager by clicking Start-Control Panel-Device Manager.

In the manager, select a non-working device, right-click on it and select "Properties".

In the window that opens, go to the "Driver" tab and click the "Delete" button

Make sure the driver you are installing is compatible with your operating system. Download if necessary desired version on the manufacturer's website.

5. If the problem that occurs when working with the equipment is typical, then it may already be fixed by Microsoft.

To apply the fix, you must install Latest updates operating system. To do this, click on the Start menu icon and select Control Panel - Windows Update.

In the window that opens, click on the item "Search for updates"

6. Last of possible solutions The problem of the occurrence of error 43 is updating the BIOS program of the computer.

She is responsible, among other things, for interaction with the equipment, and the manufacturer in new version could fix the incompatibility. To do this, go to the manufacturer's website and find a program for BIOS updates as well as instructions for its use.

As we can see, the causes of error 43 when connecting external equipment can be very diverse, and the ways to solve them also differ.

The article contains recommendations and a sequence of actions to correct most of the faults. If, after applying these tips, the problem still remains unresolved, then this may be due to a malfunction of the connected device. In this case, you should seek qualified assistance from a service center.