Crash when printing after applying the latest Windows 10 patch.

Microsoft is investigating an issue that causes a blue screen with the message “APC_INDEX_MISMATCH” when attempting to print from certain printers under OS Build 19042.867 with the latest patch for Windows 10, KB5000802, applied. We are investigating the issue.

KB5000802 fixes a privilege escalation vulnerability related to the Windows print spooler, but some printers are believed to be affected by this. The problem has been reported on overseas forums and Twitter in printers manufactured by Ricoh and Kyocera.

Microsoft is investigating the issue and will update the information as soon as there is progress.

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