In error code 43, error code 43 means that 95% of the time, a device driver is missing, corrupt, obsolete (which causes communication problems between Windows and the hardware), or the hardware is defective and must be replaced. Device drivers may be damaged or corrupted over time, and most users may experience a driver error. Installing and removing software and hardware can cause conflicts in the registry and impair communication with the drivers.
Sometimes you can temporarily bypass the error, such as removing the device from the motherboard and replacing it, unplugging the power cord, and restarting your computer after a few minutes, and so on. However, these changes are temporary and will not solve the problem.
1] Reinstall the device driver
If that does not help, try uninstalling and reinstalling the device and see if it helps:
Press Windows Key + R and type devmgmt.msc in the Run dialog box to open the Device Manager. In the Device Manager window, locate the faulty device and right-click on it, select Uninstall. After uninstalling Unknown Device in the previous step, right-click the name of your computer and select Scan for Hardware Changes.
In this way, the faulty device is finally recognized by Windows and you can double-click to view its properties. Here you will find the device status indicating that this device is working properly.
2] Update the device driver
Windows 10 updates now offer drivers to manufacturers when it passes its compatibility test. The latest version of Windows 10 and the driver may not be compatible. You can update the driver manually by downloading from the manufacturer’s website or by checking with Windows Update.
- Press WIN + X + M or right-click the Start button and select Device Manager.
- Expand the device list and look for a device with a yellow exclamation next to it. This means that the device has a problem.
- Right-click the device and select Properties.
- Select Driver, and then select Update Driver.
- Select Automatically search for updated driver.
This will force the Windows Update service to search for the latest driver. If a driver update is available, it will install automatically. Select Close when the installation is complete. You may need to restart your Windows 10 PC in some cases.
3] Recover device driver
Although the latest drivers are deployed to avoid problems with every upgrade to Windows 10, it sometimes does not work. If you have a recently installed update or have manually updated the driver software using OEM software, the only way out is to go back to the previous version of the driver that was running.
- Go to the Device Manager.
- Find the device causing the problem. It will be marked with a yellow exclamation mark next to it.
- Then, hold down your finger or right-click on the device and select Properties.
- Select Driver, and then select Return to Previous Version.
If this does not work, we suggest that you use System Restore to return to the state in which it was working. Windows typically creates a restore point whenever something is installed.