A new security update for Windows 10 makes crashing the operating system as simple as printing. The update was released in March, causing large numbers of users to be affected.
The security update in question is called KB5000802 (or KB5000808 on older versions of Windows 10) and was automatically installed on all computers running Windows 10. The vast majority of all users have thus had no say in the matter – the update has been posted on the computers in silence.
When the operating system crashes during printing, a so-called Blue Screen of Death (BSOD) appears. The error message on the screen shows an error code and the description “APC_INDEX_MISMATCH for win32kfull.sys”.
According to data, not all printer types or models are affected.
The website Windows Latest writes that printers from Kyocera, Ricoh and Zebra, among others, are affected. More specifically, if users have their drivers installed, KB5000802 will not work properly.
One person writes that their organization has at least 20 confirmed cases from four separate clients with drivers from Kyocera Universal Print. And that applies to multiple versions of the same drivers.
Uninstall KB5000802 or KB5000808
It may be a good idea to uninstall KB5000802 if you have the update on your computer while a printer is connected. How to use:
- Go to Settings> Update & Security> Windows Update
- Click View Update History
- Click Uninstall Updates
- Find KB5000802 and click Uninstall
Can not find KB5000802 in the list? You can use the command prompt to uninstall the update.
Open the command prompt or PowerShell and paste the following:
- 2004 / 20H2: wusa / uninstall / kb: 5000802
- 1909/1903: wusa / uninstall / kb: 5000808
You can choose which update to uninstall via the character combination after “kb:”.
Fix BSOD with APC_INDEX_MISMATCH
If you encountered the blue screen of error code APC_INDEX_MISMATCH for win32kfull.sys then there is a solution.
All you have to do is enable “Direct Printing” in Windows 10. This allows 32-bit apps to print on 64-bit Windows 10 without the operating system crashing.
First you need to check the status of Direct Printing. You do this with a command at the command prompt or PowerShell. Identify the name of your printer in Windows 10. Then run the following command:
rundll32 printui.dll,PrintUIEntry /Xg /n "SKRIVAREN"
Replace the “PRINTER” with the correct name of your printer.
If you see “direct” in the command prompt, Direct Printing is activated. This means that you have the correct settings and this tip will not work. Something else is wrong and is causing the blue screen you see.
If you do NOT see “direct” on the screen, activate the function in Windows 10 with the following command. Just like above, replace the “PRINTER” with the correct name.
rundll32 printui.dll,PrintUIEntry /Xs /n "SKRIVAREN" attributes +direct
Did it help? Fantastic!
If that does not help, there is one last tip to take.
- Download the Application Compatibility Toolkit from the Microsoft website
- When the app is downloaded follow the instructions here
