[BUG] Upgrading Claude desktop app causes crash requiring restart

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?

Whenever I use the popup in the bottom left of the Claude desktop app on windows to upgrade to the latest version, when I restart Claude, it crashes: "another program is currently using this file". See screenshot. A restart of the computer fixes it; I find no zombie Claude processes in Task Manager.

<img width="352" height="130" alt="Image" src="https://github.com/user-attachments/assets/0296f17e-de21-47cf-aa3e-3b48837f8384" />

What Should Happen?

I should be able to upgrade Claude without getting errors and restarting.

Error Messages/Logs

See above.

Steps to Reproduce

1. Update Claude.
2. Restart Claude.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.9669 (aea25d) 2026-03-30T20:17:34.000Z

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_