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Microsoft Windows update black-screen desktop loading failures on Azure Virtual Desktop hosts using FSLogix

Service Disruption
First reported
Last updated
Happening score
H score 0
1 unique sources, 1 articles

Summary

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Microsoft's August 2026 preview updates and later Windows releases are causing desktop loading failures on Azure Virtual Desktop hosts using FSLogix, leaving some users stuck at a black screen after sign-in. Affected users may have to manually launch explorer.exe before they can reach the desktop, and the issue can also surface as Windows Explorer crashes in event logs. Microsoft says enterprise customers can temporarily reduce the impact with Known Issue Rollback (KIR) group policies while it prepares a permanent fix.

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Timeline

  1. 25.09.2026 13:30 2 articles · 2h ago

    Windows updates cause black screens on Azure Virtual Desktop hosts

    Initial Disclosure

    Microsoft confirmed that some users installing the August 2026 preview updates and subsequent updates may hit desktop loading issues, including a black screen after sign-in and Windows Explorer crashes, especially on Azure Virtual Desktop hosts using FSLogix. Affected users can temporarily open Task Manager and run explorer.exe, and enterprise administrators can deploy Known Issue Rollback group policies for Windows 11 26H1, 25H2, and 24H2 until a future Windows update resolves the regression.

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