This is a historical correction for the stated Windows 10 2004/20H2 builds, not a request to install an old KB on another Windows release.
- Printing after KB5000802 caused APC_INDEX_MISMATCH in win32kfull.sys.
- Installed Microsoft's version-specific out-of-band correction, KB5001567 for Windows 10 20H2 or 2004.
Reported outcome: Participants explicitly confirm printing no longer caused the blue screen.
Check the exact build and Microsoft’s applicable superseding servicing information. Record this as the reported historical result; use the applicable current correction for the supported installation.