Source: BleepingComputer
Author: Sergiu Gatlan
URL: https://www.bleepingcomputer.com/news/microsoft/microsoft-recent-windows-updates-cause-desktop-loading-issues/
ONE SENTENCE SUMMARY:
Microsoft warns August 2026 Windows preview and later updates can cause black screens, mainly on AVD with FSLogix, mitigated via Explorer restart or KIR.
MAIN POINTS:
- Microsoft confirmed desktop loading failures and black screens after August 2026 preview updates.
- Issue primarily impacts Azure Virtual Desktop hosts running FSLogix user-profile technology.
- Affected users may see black screen post sign-in and no desktop access.
- Application event logs can show Windows Explorer crashes tied to the problem.
- Known affected updates include KB5120996 and KB5120998 across Windows 11 versions.
- Patch Tuesday updates KB5124008 and KB5122880 can also trigger the issue.
- Temporary workaround involves manually launching Windows Explorer to restore the session.
- Users can start explorer.exe via Task Manager’s “Run new task” function.
- Microsoft deployed a Known Issue Rollback mitigation for enterprise-managed devices.
- Administrators must install matching KIR Group Policy and reboot devices to apply.
TAKEAWAYS:
- Prioritize monitoring AVD+FSLogix environments after Windows preview or cumulative updates.
- Keep a documented helpdesk procedure for starting explorer.exe during black-screen incidents.
- Use KIR Group Policy as the fastest enterprise mitigation until a permanent fix ships.
- Track specific KBs in change management to correlate rollout timing with desktop failures.
- Expect Microsoft to reintroduce functionality later via a future Windows update resolution.