Live / Incidents / Claude

Claude: Degraded functionality for Claude Cowork on Windows

Claude · claude.aiImpact: majorResolved2026-09-14 19:14 UTC

Public — what happened

Summary

This issue has been resolved. Microsoft has released a September 14 Windows update that fixes it: https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5129195-windows-11-24h2-25h2-security-update

Timeline

Started — 2026-09-10 15:54 UTC
Last update — 2026-09-14 19:14 UTC
Resolved — 2026-09-14 19:14 UTC

Source of record: provider status page. Mirrored as reported; times in UTC.

With SquidGrid — where it starts on the route

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach Claude against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

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Related: Claude status & history. SquidGrid is not affiliated with Claude.