The Windows 10 KB5000802 and KB5000808 cumulative updates released yesterday are causing Blue Screen of Death crashes when printing to network printers.
Microsoft released the Windows 10 KB5000802 and KB5000808 cumulative updates as part of the March 2021 Patch Tuesday.
Since then, there has been a constant stream of complaints that printing is causing Windows 10 to crash with an "APC_INDEX_MISMATCH for win32kfull.sys" blue screen of death crash.
Example APC_INDEX_MISMATCH for win32kfull.sys crash
Microsoft has pulled the updates from Windows Update while they look into the issues. However, the updates are still available via the Microsoft Update Catalog.
Furthermore, some of our machines are being offered the KB4601382 Preview cumulative update released on February 24th, but not yesterday's KB5000802 update, indicating that a security update is likely causing the crashes.
New Windows 10 KB5000802 update not offered
New Windows 10 KB5000802 update not offered During the June 2020 Patch Tuesday updates, a bug was also introduced that prevented users from printing. To resolve these printing issues, Microsoft released out-of-band updates for Windows users.
How to fix the win32kfull.sys crashes when printing
Unfortunately, attempts to fix the issue by upgrading printer drivers have been mainly unsuccessful.
Instead, Windows 10 users have been forced to uninstall the KB5000802 or KB5000808 updates for printing to work correctly again.
If you are affected by the printing bug, you can uninstall the Windows 10 KB5000802 cumulative update by closing applications and opening a command prompt. In the command prompt, enter the following command:
wusa /uninstall /kb:5000802
To uninstall the Windows 10 KB5000808 cumulative update, use this command instead:
wusa /uninstall /kb:5000808
You can use this guide for more help uninstalling the updates.
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