Microsoft issues official fix for blue screens and printing problems in Windows 10
If you've installed Windows 10 updates this month, you may well have started to experience problems with printing, as well as seeing blue screens with an APC_INDEX_MISMATCH error. After acknowledging the problem, Microsoft initially offered a workaround, but now the company has released a proper fix for the issue.
The fix takes the form of an out-of-band update for Windows 10 as Microsoft rushed to patch the bug introduced by the March 2021 cumulative updates. In all, there are four patches to install, each for different builds of Windows -- KB5001565, KB5001566, KB5001567 and KB5001568.