Claude Desktop on Windows 11 25H2 crashes when switching to Code section (Chat and Cowork work fine)

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?

Environment

• OS: Windows 11 Pro, Version 25H2 (OS Build 26200.8246)
• Claude Desktop version: 1.4758.0.0 (MSIX, Claude_pzs8sxrjxfjjc)
• Claude Code CLI: 2.1.119
• Node.js: v24.15.0

What's wrong

Claude Desktop launches normally. Chat works. Cowork works.
When I switch to the Code section, the Desktop UI crashes within ~10 seconds.
Every time. Reproducible 100%.

main.log

Already tried (none resolved the issue)

• Full uninstall and reinstall of Claude Desktop
• Killing all leftover Claude processes in Task Manager and relaunching
• Multiple application restarts

Post-crash process state

After the Desktop UI crash, Task Manager shows the main Claude process gone,
but the following remain running as orphans:

• Claude Code (~410 MB) — the spawned Code child process
• cowork-svc.exe (~15 MB)

The Code child process is not terminated when the Desktop UI dies.

Log findings (main.log attached)

Recurring error at every startup, present across versions 1.3561.0.0,
1.3883.0.0, and current 1.4758.0.0:

What Should Happen?

The Code section in Claude Desktop should open and stay running like the Chat and Cowork sections do. Instead, the Desktop UI crashes within ~10 seconds every time I switch to Code.

Error Messages/Logs

Recurring at every startup (versions 1.3561.0.0, 1.3883.0.0, 1.4758.0.0):

[error] [Chrome Extension MCP] Failed to copy native host binary:
Error: EBUSY: resource busy or locked, copyfile
'C:\Program Files\WindowsApps\Claude_<version>_x64__pzs8sxrjxfjjc\app\resources\chrome-native-host.exe'
-> 'C:\Users\<user>\AppData\Roaming\Claude\ChromeNativeHost\chrome-native-host.exe'

Followed by:
[error] Sentry caught: { type: 'Unknown', value: 'No message', stack: undefined }

GPU crash also logged once:
GPU process gone: { type: 'GPU', reason: 'crashed', exitCode: 34, serviceName: 'GPU' }

The actual Code-section crash produces NO log entry — Desktop dies silently. After crash, Task Manager shows orphaned `Claude Code` (~410 MB) and `cowork-svc.exe` still running. main.log attached.

Steps to Reproduce

1. Launch Claude Desktop
2. Use Chat — works fine
3. Use Cowork — works fine
4. Switch to the Code section
5. Desktop UI crashes within ~10 seconds

Already tried: full uninstall+reinstall, killing leftover processes, multiple restarts. None resolved.

main.log

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.119 (CLI), running inside Claude Desktop 1.4758.0.0 (MSIX)

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

Claude Desktop integrated Code section (not standalone CLI). Tested separately in PowerShell — CLI works fine.