Major incident

SU ITS: Claude Desktop and Cowork errors on Windows

Affected: claude.ai

Current status of SU ITS: Minor issues — live SU ITS status

Timeline

1. Sep 17, 2026, 18:46 UTC
   identified
   Some Windows users are seeing errors when launching Claude Desktop or Claude Cowork following a recent Windows update. ITS has identified the cause and is working on a fix. No timeline is available yet. We'll update this post as more information becomes available.
2. Sep 17, 2026, 19:51 UTC
   monitoring
   ITS is applying a Microsoft-provided fix to affected Windows machines under emergency change ITSCM-6039. Users may see a Windows update install and a restart prompt. We'll continue monitoring and update this post once the fix has been confirmed.
3. Sep 18, 2026, 17:28 UTC
   resolved
   Microsoft has released a corrected update for the September Windows patch, and ITS has pushed it to managed clients. Some devices will complete a second round of updates as a result. If you are experiencing application issues, including with Claude, please confirm Windows Updates are fully installed before troubleshooting further. If you are continuing to experience an issue please contact the ITS Service Center at [email protected] or 315.443.2677.

Updates as published by SU ITS (original).