Security News > 2023 > January > Microsoft fixes issue causing 0xc000021a blue screen crashes
Microsoft has addressed a known issue causing Blue Screen of Death crashes with 0xc000021a errors after installing the Windows 10 KB5021233 cumulative update released during the December Patch Tuesday.
The issue was fixed in the KB5022282 update issued today for all Windows 10 versions currently under support.
"This update addresses a known issue that might affect startup on some Windows devices," Microsoft said.
The list of affected platforms includes only client Windows versions, from Windows 10, version 20H2 to Windows 10, version 22H2. While Microsoft is yet to share any info about Windows 11 systems also being affected, the KB5022287 Windows 11 21H2 cumulative update released today says it addresses this same issue.
For those who cannot immediately install today's cumulative update, Microsoft provides a temporary fix to work around this blue screen issue and revive impacted systems to start as expected.
Sys file from the system32drivers folder into system32 using the Windows Recovery Environment to ensure that the file signature validation no longer fails to trigger the blue screen crashes.