Solved: APC_INDEX_MISMATCH (win32kfull.sys) Windows blue screen when printing

[Andy]

If you run into APC_INDEX_MISMATCH BSOD after KB5000802 update, run the following command in an elevated command prompt:

For Windows 10 build 2004 or 20H2:

wusa /uninstall /kb:5000802

For Windows 10 build 1909 or 1903:

wusa /uninstall /kb:5000808

I hope this simple resolution works for you

src://www.windowslatest.com/2021/03/10/windows-10-kb5000802-march-update-is-crashing-pcs-with-bsod/