Resolved · lasted 9 h
Claude outage on September 10
Reports for Claude jumped to 147 an hour and stayed high for 9 h.
- Started
- 2:00 PM
- September 10, 2026 · UTC
- Back to normal
- 11:00 PM
- 9 h later
- Peak
- 147/hr
- 5× normal
- Anthropic’s incident
- 99 h 21 min
- Degraded functionality for Claude Cowork on Windows
Reports during the outage
What Anthropic said
status.claude.comDegraded functionality for Claude Cowork on Windows
- Resolved · 7:14 PM
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
- Identified · 3:54 PM
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.
Anthropic posted its first update 1 h 54 min after reports started rising.
What people said
- RB2:31 PM
El bash sigue caído
1 comments during the outage
Is Claude down right now?
Live status, today’s reports and other past outages.