[BUG] Claude failing to copy on update.

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?

When I run claude code, it creates a new claude.exe that is 0 bytes and copies the old .exe to claude.exe.old.1760308994728 and then failed to continue. I assume this is due to it trying to copy on update or something.

What Should Happen?

It should not do this.

Error Messages/Logs

Steps to Reproduce

I just run claude.exe native on Windows 11.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.13

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_