Microsoft Fixes Windows 11 Bug Breaking Down Direct3D 9 Apps

Microsoft has announced that the bug causing certain apps using Direct3D 9 to crash has finally been resolved in Windows 11 and Windows 10.

The glitch was originally caused by the cumulative update shipped by Microsoft as optional in late April, with Microsoft explaining it used the Known Issue Rollback system to bring things back to normal.

“After installing KB5012643, Windows devices using certain GPUs might have apps close unexpectedly or intermittent issues with some apps which use Direct3D 9. You might also receive an error in Event Log in Windows Logs/Applications with faulting module d3d9on12.dll and exception code 0xc0000094,” Microsoft explains.

“This issue is resolved using Known Issue Rollback (KIR). Please note that it might take up to 24 hours for the resolution to propagate automatically to consumer devices and non-managed business devices. Restarting your Windows device might help the resolution apply to your device faster. For enterprise-managed, d… (read more)

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