Claude outage: Degraded functionality for Claude Cowork on Windows

Affected components

• Claude Cowork

1. resolvedSep 14, 2026, 19:14 UTC

   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

2. identifiedSep 10, 2026, 15:54 UTC

   A Windows update released September 8 has left Claude Cowork on Windows unable to run local commands, because its workspace can no longer reach your computer's drive. For most users, chat and file reading and editing still work. There's no in-app workaround yet, and restarting or reinstalling won't help. Microsoft has developed a fix and is working to release it. We'll post an update when we have more to share.

What APIStatus.watch saw

• Sep 10, 2026, 15:55 UTCoperational → degraded
• Sep 14, 2026, 19:15 UTCdegraded → operational

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

• Snowflake: INC20000213Critical · Sep 11, 2026, 07:18 UTC
• Resend: Unresponsive remote MCP serverCritical · Sep 11, 2026, 19:27 UTC
• GitHub: Incident with several GitHub ServicesCritical · Sep 13, 2026, 09:16 UTC
• Elasticsearch: Replication bug causing slow recoveriesMajor · Sep 1, 2026, 08:16 UTC
• MongoDB Atlas: Impaired Cluster operations in AWS me-central-1 and AWS me-south-1Major · Sep 3, 2026, 16:44 UTC
• Elasticsearch: Elastic Agent enrollment/check-in failures on 9.5.3 (and 9.4.6) with Fleet remote Elasticsearch outputMajor · Sep 9, 2026, 20:44 UTC
• Elasticsearch: Kibana access restored for UI-assigned Organization Owners on Hosted deploymentsMajor · Sep 10, 2026, 01:30 UTC
• HashiCorp Vault: Hashicorp Linux packages GPG key rotationMajor · Sep 10, 2026, 13:24 UTC
• Sentry: Sentry.io elevated number of 500 errorsMajor · Sep 10, 2026, 15:25 UTC
• Supabase: Unresponsive ProjectsMajor · Sep 10, 2026, 15:26 UTC

How often does Claude have incidents?

Claude reported 47 incidents in the last 90 days, 21 of them major or critical. A typical incident lasted 1h 4m. See Claude's uptime and incident history