[BUG] Install silently fails on Windows 11 25H2

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?

Here's a summary for the bug report:

Bug Report: Windows PowerShell Installer Fails Silently

Environment:

• OS: Windows 11
• Installation Method: PowerShell (irm https://claude.ai/install.ps1 | iex)
• Claude Code Version: 2.0.67

Issue:
The PowerShell installer reports successful installation but fails to actually create the claude.exe file in the target directory.

Steps to Reproduce:

1. Run PowerShell as Administrator
2. Execute: irm https://claude.ai/install.ps1 | iex
3. Installation completes with success message: ✔ Claude Code successfully installed! Location: C:\Users\[user]\.local\bin\claude.exe
4. Check the directory: Test-Path "$env:USERPROFILE\.local\bin\claude.exe" returns False

Expected Behavior:
The claude.exe file should be copied to C:\Users\[user]\.local\bin\claude.exe

Actual Behavior:

• The .local\bin directory is created successfully
• The installer reports success and shows the correct installation path
• Warning message appears: "installMethod is native, but claude command not found at C:\Users\[user]\.local\bin\claude.exe"
• The claude.exe file is never actually copied to the destination
• The claude.exe install stable subcommand fails silently to copy itself

Root Cause:
The installer downloads claude.exe to a temporary location, runs claude.exe install stable, which reports success but fails to copy the executable to the final destination.

Workaround:
Manually copy the downloaded installer to the destination:

Copy-Item -Path $downloadPath -Destination "$env:USERPROFILE\.local\bin\claude.exe" -Force

Additional Notes:

• No errors appear in verbose mode
• No antivirus/Windows Defender blocks detected
• Issue occurs even when running as Administrator

What Should Happen?

Should install correctly

Error Messages/Logs

⚠ Setup notes:
  • installMethod is native, but claude command not found at C:\Users\savov\.local\bin\claude.exe

Steps to Reproduce

irm https://claude.ai/install.ps1 | iex

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.67

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_