Windows: App unusable after update — file lock + spawn EBUSY (v1.3561.0.0)[BUG]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Clicked "Update" in Claude Desktop on Windows 11. App closed and
never launched again — "File is in use by another program" error
at C:\Program Files\WindowsApps\Claude_1.3561.0.0_x64__pzs8sxrjxfjjc.

CoworkVMService locks package files. Set-Service and sc.exe return
"Access Denied" even with admin rights. Had to disable service
via registry (HKLM Start=4).

After full reinstall (Remove-AppxPackage + reinstall), sending
messages fails with "spawn EBUSY". 9+ claude.exe processes pile up
every send attempt.

Spent 2+ hours middle of the night fixing this. Script crashed due
to forced reboot. App still doesn't work. Paid Max subscription.

Version: 1.3561.0.0
OS: Windows 11
Install: MSIX / Microsoft Store

What Should Happen?

The paid app have to start working

Error Messages/Logs

Steps to Reproduce

Clicked "Update" in Claude Desktop on Windows 11. App closed and
never launched again — "File is in use by another program" error
at C:\Program Files\WindowsApps\Claude_1.3561.0.0_x64__pzs8sxrjxfjjc.

CoworkVMService locks package files. Set-Service and sc.exe return
"Access Denied" even with admin rights. Had to disable service
via registry (HKLM Start=4).

After full reinstall (Remove-AppxPackage + reinstall), sending
messages fails with "spawn EBUSY". 9+ claude.exe processes pile up
every send attempt.

Spent 2+ hours middle of the night fixing this. Script crashed due
to forced reboot. App still doesn't work. Paid Max subscription.

Version: 1.3561.0.0
OS: Windows 11
Install: MSIX / Microsoft Store

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

N/A — Desktop App issue, not CLI

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_