What to do if the card shows error 43. What is Unknown Device and how to fix it

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Error code 43 means the device cannot be identified. The computer tries to access and recognize the hardware, but fails and reports that the device has been stopped. The problem in Windows 7, 8.1, 10 occurs after installing a new driver, updating the system, or while working with “heavy” graphic applications.

Before moving on to software solutions, check how the video card is installed in the slot. Often, when cleaning the system unit from dust, we can break the tightness of the contacts in the video card slot or the connection of the cable to the additional power connector (if available). Press them firmly and make sure that the latches are securely locked and the cable is securely connected to the auxiliary power input.

Now, in order.

If video card error 43 occurs, press the Windows + R key combination, type “devmgmt.msc” and click on Enter.
In Device Manager, expand the Display Adapters category, right-click on the device and select Disable.
Now turn off your computer. Remove the battery (if you have a laptop) or unplug the power cable (if you have a PC).
If you have a computer, open the cover of the system unit and check the tightness of the video card in the slot and the connection of additional power.
Then start the computer, turn on the video card in Device Manager and check if error code 43 was fixed.

Uninstalling the Lucid VIRTU MVP application

Video card error code 43 can be caused by the Lucid VIRTU MVP application, which is installed with Windows 10 updates. The application is not compatible with NVIDIA devices and produces various problems.

Lucid VIRTU MVP allows you to switch between integrated graphics and an external discrete graphics card. This is a useful tool, but conflicts with NVIDIA software.

Press Windows + R keys simultaneously, enter “appwiz.cpl” and confirm with Enter. A list of applications installed on the PC will open. Find “Lucid MVP”, right click on it and select “Uninstall”.

After restarting your PC, see if error code 43 was resolved.

Installing the latest Windows update

The problem also occurs if automatic Windows updates are disabled, but the system has not been updated manually for a long time.

Press the Windows key + S to bring up the Start menu search bar. In the dialog box, enter “Windows Update.” In the search results, click on the item found.

In Settings, click “Check for updates.” Now Windows will automatically download and install them. After downloading them, restart your PC and see if the video card is working correctly and the error is resolved.

Removing drivers

A faulty driver can also stop the device and display a message with video card error code 43.

Boot your computer in safe mode and remove the installed video driver. After reboot, it will be installed automatically when the video card is detected correctly.

After booting into safe mode, press Windows + R to launch the Run window and enter the command “devmgmt.msc”

In Device Manager, expand “Video Adapters” and right-click on the NVIDIA or AMD Radeon device. Select "Delete". Now restart your PC.

Updating the driver to the latest version

If the above methods fail to resolve video card error 43, try updating your video driver. It may be outdated or not working properly.

We need to completely remove all traces of installed graphics drivers before installing new ones, so we'll use the Display Driver Uninstaller utility. It is freely available and you can easily download it from the Internet.

After installing Display Driver Uninstaller (DDU), boot your PC in Safe Mode.

Launch the application and select "Safe Mode".

In the main window, click on the first button “Remove current and previous drivers and restart the computer.”

After your computer boots normally, launch GeForce Experience. Go to the Drivers tab and click Download. Specify the specification on the right side of the screen and click “Check for updates.”

After downloading them, restart your PC.

If you were unable to install the latest version, you need to make sure that your drivers are updated automatically by Windows Update. If yes, you need to roll back to the previous version.

Press Windows + S to bring up the system search window and type "system". Click on it in the search results.

Then go to Advanced System Settings on the left side of the screen.

Open the “Hardware” tab, go to “Device installation options”.

Select the option “No, the device may not work correctly.” Click "Save" and close the window. Afterwards, Windows Center will not automatically download drivers.

Now press Windows + X to open the Quick Launch menu and go to Device Manager.

Select the second option “Browse this computer for driver software.” Go to the folder where you downloaded the video driver package and follow "Next".

After restarting your PC, check if the error is fixed.

Checking GPU Temperature

A common cause of graphics card error code 43 can be the temperature of the graphics processing unit (GPU).

Before checking, you need to open the system unit and clean the video card from dust, for example, using a compressor.

If it operates at extreme temperatures, it will be necessary to install additional cooling or replace the old one with a more efficient one for heat removal. Often, after replacing the cooling system, it is possible to correct error code 43.

You can check the temperature of your video card using the GPU Temp utility.

Bios update

BIOS is the firmware used to perform hardware initialization during the boot process of the PC. This basic I/O system is pre-installed on the motherboard by the manufacturer and is the first software that runs when the system starts. The BIOS is also responsible for testing hardware components and checking their functionality.

On the forums, users reported that updating the Bios could instantly solve error code 43. They also recommend reinstalling it, even if it is updated to the latest version.

Any operating system is not immune to various types of errors. This is exactly the error that we will talk about today. We continue to reveal the shortcomings in Windows 10 and talk about its errors.

I am sure that those who have been using Windows for a long time have encountered such a video card error, with code 43, other devices can also produce error 43. This error can occur on both a computer and a laptop. The PC model and manufacturer does not affect the appearance of this error.

In this case, in the system device manager on the video adapter or other device, an icon in the form of a yellow triangle with an exclamation mark will be displayed, and in the device properties the following will be written: “This device has been stopped because it reported a problem (code 43).”

If your operating system is in English, then the description of the error code will look like this: “Windows has stopped this device because it has reported problems. (Code 43)”.

There may be several reasons for this error to appear. They can be all at once, or they can be separately. These include:

short-term failure of the Windows operating system
garbage or broken registry keys of the Windows operating system
device driver problems
conflict with other equipment.

Fixing error 43

There are several ways to solve this problem. If everything is not so bad, then you can “cure” the device in two clicks. But if the problem has started, then you will have to spend time to fix everything.

Method for correcting error 43 No. 1

You need to start with the most harmless reason - a common simple failure of Windows. To solve this problem, you need to turn off your computer or laptop and simply unplug the power cord from the outlet. If the problem occurs on a laptop, you need to disconnect the battery. After 10-15 minutes you can connect everything again. If the problem could not be solved, and error code 43 is still present. We move on to the next step in solving the problem, which is to restore order in the system.

Method for correcting error 43 No. 2

The next step is to solve our problem - we try to clean the registry of the operating system from dozens of various types of garbage, which may have caused error 43. If you are a frequent visitor to our site and YouTube channel, you are probably familiar with a program such as CCleaner or RegOrganizer. I showed how to clean the registry using this video:

And in this video I showed RegOrganizer which will help fix almost all problems with Windows:

After the analysis is completed and you see all the problems that are present on your computer, click on the “Fix” button. When the program completes its work, you need to restart the computer and check if the problem with code 43 has been resolved. If this the option did not bring a positive result, we move on to the next one.

Method for correcting error 43 No. 3

Now that the previous two options did not help, we move on to more decisive actions. We are talking about rolling back Windows. This method is good as a solution to many problems and errors in any version of Windows. You need to restore the system to a previous restore point when the video adapter worked without problems. I showed this here:

If you have disabled saving recovery points or the problem has not been resolved after rolling back Windows, you should try reinstalling and updating the video card driver. Do not forget that when the computer is running, the video driver can malfunction or crash. Naturally, after that it will not work properly. Therefore, it is necessary to update it to the latest version. If you have an NVidia video card, you can download the driver. For users with AMD Radeon video cards, you can download the driver. For other devices, look for the driver like this:

After you download the installation package you need, you need to run it. If the software does not want to be installed automatically. You'll have to do everything manually.

In order to update the driver manually, you need to open the Windows Device Manager, find the “Video Adapters” section. Open the subsections by clicking on the cross.

After that, find your device and right-click on it. In the menu that opens, select “Update driver...”. After that, specify the path to the folder with the driver to update and run it. After a few minutes, the driver will be updated.

Method for correcting error 43 No. 4

One of the reasons why error code 43 has not been resolved may be due to a buggy operating system or a conflict with other devices. In order to check this variant of the problem, you need to do the following: open the “Control Panel”, find the “System and Security” section, look for “Administration”.

In the window that opens, find “system configurations” and open them.

At the top we find the “Download” tab and click the “Advanced options” button.

Another window will open in which you need to check the “Maximum memory” box. After that, click “Ok”.

After all operations, the computer or laptop must be restarted and checked to see if error code 43 has disappeared.

Method for correcting error 43 No. 5

If after this our annoying error still does not disappear, you need to pick up a screwdriver and remove the cover from the system unit or the back cover of the laptop. It's time to influence RAM or other devices with your own hands.

But don’t forget that before you climb inside the system unit or laptop, you need to unplug the power cable. Only then can you unscrew the lid. You need to get all the RAM strips except one. It is better to disable other devices that may cause conflicts, this could be a sound card, network card, tuner, IEEE 1394 and anything else that you may have connected to your PC. Everything that does not affect the operation and loading of the PC can be disabled.

After that, we assemble the computer and turn it on with the remaining RAM. If the error disappears, then turn off and de-energize the system unit again, and then add the next bar. We turn on the computer again and check to see if the error has appeared. Using this method of elimination, we will find the source of our problem. To be more confident, it is necessary to check the operating level that we left as the very first one.

Bring your PC in for repair!

If all of the above methods did not bring a positive result, and error code 43 remains, then most likely the problem is in the device itself. The PC must be taken to repair for diagnostics.

Actually, that's all. As you can see, there is nothing complicated in solving this problem. Even the last method will not steal much of your time. So good luck to you in solving such problems. Stay with us on the site there are many useful articles and programs.

Sometimes Code 43 blue screen errors related to hardware can be caused by corrupted random access memory (RAM). If you are experiencing random computer reboots, beeping sounds on startup, or other computer problems (in addition to BSOD 43 errors), then it is highly likely that your memory is corrupted. In fact, almost 10% of application crashes on Windows OS are caused by memory corruption.

If you have recently added new memory to your computer, we recommend temporarily removing it to make sure it is not the cause of the Code 43 error. If this action clears the BSOD, then this is the source of the problem, and therefore the new memory is either incompatible with some other device. either your equipment or is damaged. In this case, you will need to replace new memory modules.

If you did not add new memory, the next step is to run a diagnostic test on your computer's existing memory. A memory test will scan for severe memory failures and intermittent errors that could be causing your Blue Screen of Death 43.

Although recent versions of Windows include a RAM test utility, I highly recommend using Memtest86 instead. Memtest86 is a BIOS-based testing software, unlike other test programs that run on Windows. The advantage of this approach is that the utility allows you to check ALL operating memory for Code 43 errors, while other programs cannot check memory areas occupied by the program itself, the operating system and other running programs.

Working on a computer or laptop with Windows 7, 8 or 10 OS, each of us has probably encountered a situation where a message unexpectedly comes when a particular error or problem has occurred. Of course, this news may immediately confuse or even frighten the user, but if you look into it, there is nothing wrong with it.

Most of these failures can be solved with your own hands, without specifically contacting service centers for this. The main thing is to understand what happened and with which device. The number that indicates each error will help you with this.

We are dealing with a failure code 43. It indicates problems in the functioning of the graphics adapter. Of course, this error can also be associated with incorrect USB operation, but in most cases it still concerns the video card and its drivers.

Driver failure

Sometimes it happens that drivers for a graphics adapter simply fail, for no apparent reason. In this case it is necessary:

Open "" and go to the "Video adapters" section.

When you open the detailed description, you will see the following: This device has stopped due to a problem (error code 43). On different versions of Windows OS, the message may differ, but its essence is the same - the video card has failed.

How to fix the error?

To resolve error code 43 you must:

Often this helps to completely fix error 43, however, if nothing has changed, move on to the next step.

Conflict between video cards

If the system begins to display error code 43 after installing a new discrete video card, then you should turn your attention to its manufacturer. The failure may have occurred due to the use of graphics adapters from different manufacturers.

Owners of new nvidia video cards especially often encounter this problem. In this situation, the only thing that will help you is not to use a new component, and to buy a device from the same company that is installed on a PC or laptop.

Reinstalling the OS

To solve this problem, you should try to completely reinstall the operating system. After this is done, you will have to reinstall the drivers for all connected devices, including the graphics adapter. If, after reinstalling and restarting the device, error 43 still appears, is it worth remembering when was the last time you changed the thermal paste?

Replacing thermal paste

It's possible that your graphics adapter is causing this problem due to it overheating quickly and excessively. In this case, the reason is the thermal paste. By the way, you will learn which one is best to use. Most likely, you have not changed it since purchasing the video card, and it has simply become unusable.

For this you need:

Disassemble the video card.
If this happens, the thermal paste needs to be replaced.
Collect the fee back.
Start the PC and check if everything works.

If even after replacing the thermal paste nothing has changed and your computer still reports a failure, then the problem will have to be solved in a completely different way.

Warming up with a hairdryer

The only remaining option is to warm up the video card chip using a special hair dryer. To do this, you need to go to the nearest service center, where real professionals can take care of your problem.

Some craftsmen neglect specialized help and fry the boards in a regular oven. Of course, this procedure can and will give the desired result, but the service life of the device in this case will not exceed 1-2 months, after which the card will be completely expired. Moreover, it should be taken into account that after such “baking” the warranty will no longer be valid.

Now you know why video card 43 may fail and how you can fix it. If none of the above methods helped you, then most likely it needs to be replaced.

Video on the topic

One of the leading interfaces for connecting devices is USB. Using this standard, you can exchange data with many types of devices, and it also has good compatibility with software.When you connect a device via USB, the computer should immediately detect it, but an unexpected failure may occur. In this article we will look at device code 43 USB.

The problem appears for various reasons and due to any, so to speak, devices with a USB interface. In Explorer, you will not see the connected device, be it a flash drive or an HDD drive, and in the device manager it is not detected at all and is marked with a yellow exclamation mark.

In the properties of the problematic device you can see the following lines: “Windows stopped this device because it reported a problem. (Code 43)", or something similar.

Why does the device report code 43

Below we will look at several reasons and their solutions as to why the device reports code 43 when connected via USB.

Reason 1: Ports are damaged

<Редко> It is possible that the device was connected to a damaged port, which is why there is no contact with the system board. It is necessary to carefully inspect the port; it is advisable to completely disassemble the PC or laptop and see if everything is in order. If there are additional ports, try to connect the device to them; if it does not work and error 43 appears, then the problem is most likely in the device itself or the wire.

Reason 2: PC hardware malfunction

<Редко> It happens that when connecting, the device displays an error only due to a temporary hardware failure. This happens and can be easily fixed: you need to restart the computer - this is the best case scenario, or completely turn off the power, wait a couple of minutes, and then turn it on again and check its functionality.

In a laptop, you do exactly the same thing, you just need to remove the battery. And after turning it on, you connect everything you need via USB.

A beginner, of course, will not be able to detect a malfunction by eye. Then try contacting good friends who understand this matter. Naturally, because of one mistake, there is no point in contacting the service center. You know how much money you will leave there.

If the device has reported problems and code 43 and you are sure that the problem is not in the hardware, then move on to the next reasons.

Reason 3: Power saving for USB mode

<Часто> If there is insufficient energy for the device, error 43 occurs, so you will not detect the device. This problem can be fixed very easily. Go to the device manager by clicking the Win+X keys and selecting the desired item.

Reason 4: Problems with USB drivers

<Очень часто> There are situations when you connect a device, it installed the driver normally and there is a conflict with other drivers, for example, outdated ones. When you connected a similar device and the necessary software was already installed, then these drivers may be incompatible with this device. Here we see device code 43 USB. Then you can remove the driver for this device. Right-click on it and select "Delete". This is all done in the device manager.

After these steps, it is advisable to restart the PC and reconnect the device. I also have an article that should help with this too.

One more thing. If the problem is in the USB controller drivers, then we do the same procedure - remove the device, and then restart the PC. You need to delete it exactly.

If the drivers are outdated, then they need to be updated and this is done very simply. Open the device manager and right-click on the problematic device. Select the parameter.

A window opens where we select . By the way, you can try the first option first.

Another window appears where we select the same driver intended for USB. It is most likely called a "USB Root Hub". Press the button "Further".

We do the same for all USB devices in the “USB Controllers” section.

An effective way to remove drivers for error 43 in Windows

If you are unable to remove the driver you need, and this most often happens, there are special utilities that will do everything in a couple of clicks.

Since the device reported a problem code 43, this may be a driver conflict or a normal failure during automatic driver installation. Then we will simply remove all USB drivers, both new and outdated and conflicting. There is no need to be afraid; after connecting disks, flash drives and other devices, the drivers will be re-installed.

Download the wonderful USBOblivion program from here - https://www.cherubicsoft.com/projects/usboblivion. We simply launch the downloaded file and see a window in front of us with a couple of buttons and checkmarks.

Before cleaning the drivers, be sure to disconnect all USB devices from the ports.

So, to begin with, you can immediately start checking the system for drivers. To do this, click “Cleaning” (a simulation will be carried out), that is, nothing will actually be deleted.

To really clear the system of conflicts when connecting devices, check two boxes:

Do the actual cleaning.
Save the undo .reg file - in case the deletion was unsuccessful and something happened to Windows.

Press again "Clear" We wait a couple of seconds and that’s it. I then restarted the computer and reconnected the devices that weren't working. I got rid of USB code 43 perfectly.

Reason 5: After reinstalling or updating drivers

<Редкая> If you just reinstalled Windows, then a lack of necessary drivers, even for the motherboard, can cause code 43 when connecting USB devices. Then you can use third-party software to install drivers for the motherboard and many other components. For example, DriverPack Solution. You can also find it manually on the manufacturer's website.

Reason 6: Registry problems

<Редкая> Not always, but error 43 USB also appears due to errors in the registry. Long-term use of a computer causes multiple entries in the registry, which lead to errors, so it needs to be cleaned periodically. The best utility for this would be CCleaner, although there are others to suit everyone's taste.

In the Registry section, click the button "Search for problems". Then we press the button "To correct", a message about creating a backup copy of the deleted entries will appear. We definitely do. After completing the procedure, reboot the computer.

Other options for error 43 USB

We have looked at many options for why unknown device code 43 appears. But that’s not all, maybe there are other reasons and they can be eliminated in some other way. I hope many of you who have found additional solutions will share this in the comments.

So, there are reasons that play an unlikely role in the appearance of error code 43, but we will also include them here.

Perhaps the problem is in damaged system files, then you need, for this you need to launch an elevated command prompt and enter the following command sfc /scannow .

Also check the same device on another computer or port; if it doesn’t work there either, then the problem is in the USB controller of the device itself. All that remains is to send it in for repairs.
If you have USB hubs and this error appears, try connecting without them.
If none of the above helped, but you are sure that the problem arose due to a system failure, then you can, of course, if you have one.
Finally, the very last thing is to reinstall the system, but I recommend doing this only if you are sure that the problem is not in the device itself, and the computer ports are in perfect order, then it is quite possible that the problem is at the software level.

I have a mouse connected via USB to a laptop, it’s not that old, but after connecting, the message “Device descriptor request failed” appears and, accordingly, error 43. I tried all the methods that are indicated in this article, it did not help. I read it on the Internet, it’s the same everywhere and nothing helps. The conclusion is obvious - the USB controller of the mouse itself has failed, this is easy to check, you need to try to connect it to another computer, where it also malfunctioned. More precisely, she behaves like a stubborn child and works whenever she wants. There are no problems with other mice.