Solutions for addressing Windows Event Log shows error ID20
After updating to DCH graphics driver Windows Event log registers an error ID 20: Windows Update Client 9NCGJX5QLP9M-AppUp.IntelMediaSDKDFP
This happens constantly and on every restart.
May also experience white screen when opening applications and games.
There are three possible solutions to this problem.
Use only drivers provided directly by your Original Equipment Manufacturer (OEM) as they are customized and validated for your system configuration.
Follow these steps to properly switch to the best OEM drivers for your computer:
1. Disconnect from the Internet.
2. Uninstall the generic DCH drivers via Start > Settings > Apps & Features.
3. Uninstall the (DCH) Intel® Graphics Control Panel via Start > Settings > Apps & Features.
4. Restart the computer.
5. Reconnect to the Internet.
6. Go to Device Manager > Right-click on Intel® HD Graphics or Microsoft Basic Display Adapter.
7. Select Update Driver.
8. Allow Windows Update to Search for the best drivers for your system.
9. Install the driver.
10. Restart the computer.
Force the generic DCH drivers. This option is not recommended as it overrides any customization done by your OEM.
If you still wish to use generic DCH drivers then follow these steps:
1. Download the latest DCH driver from Download Center and save it on your Desktop.
2. Disconnect from the Internet.
3. Uninstall any existing DCH Graphics driver via Start > Settings > Apps & Features.
4. Uninstall the (DCH) Intel® Graphics Control Panel via Start > Settings > Apps & Features.
5. Restart the computer.
6. In Device Manager > Right-click on Intel® HD Graphics.
- If "Microsoft Basic Display Adapter" is already listed skip to step #10.
7. Select Uninstall device.
8. Enable the option Delete the driver software for this device and click Uninstall.
9. Restart the computer.
- This should delete any non-DCH driver stored on Windows driver repository. Repeat steps #6 through #9 until "Intel® HD Graphics" changes to "Microsoft Basic Display Adapter")
10. Install the DCH driver downloaded in step #1.
11. Restart the computer.
12. Reconnect to the Internet.
13. The (DCH) Intel® Graphics Control Panel should be downloaded automatically after a few minutes upon restart. If it doesn't, go to Microsoft Store and download it.
14. Restart the computer.
Remove 9NCGJX5QLP9M.dat file from installation directory.
The Intel Graphics Driver installation process is installing file 9NCGJX5QLP9M.dat in directory "C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\InstallAgent\Checkpoints"
Updating non-DCH (a.k.a Legacy) to generic DCH drivers from Download Center, may generate a conflict on branded systems.
The OS tries to download the Intel Graphics Control Panel from the Microsoft Store and yet this is recorded as a failure in Event log (even if the Graphics Control Panel is already installed).