[BUG] Claude Code Desktop on windows errors when updating

### Preflight Checklist

- [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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?

I'm filing this again, because other issues for it have never been addressed.

Whenever the desktop app for Claude Code updates on windows it throws the below error and I have to reboot my machine to get the update to finish. It has been going on for a VERY long time and MANY users have reported. Please at least give us some type of feedback about the issue.

### What Should Happen?

Claude Code desktop app should update cleanly on windows.

### Error Messages/Logs

```shell

```

### Steps to Reproduce

1. Install Claude Code desktop on windows
2. Let it auto-update

### Claude Model

None

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

_No response_

### Claude Code Version

All of them

### Platform

Anthropic API

### Operating System

Windows

### Terminal/Shell

Windows Terminal

### Additional Information

This has been plaguing Windows users for many months. A previous issue was marked "invalid" with no explanation. Given the hundreds of users commenting to this day, it is obviously still a very big issue. Please address it.

No source file, test, or updater entry point is named. Start by reproducing the auto-update on Windows and examining the error shown in the attached image; done means the desktop app updates cleanly without requiring a reboot and provides useful feedback when it fails.

Written by the indexing model from the issue text.