Virtualization not working on Windows 11 Enterprise

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?

OS: Windows 11 Enterprise
Installed from: claude.ai/download
Clean reinstall performed: ✅
Hyper-V / Virtual Machine Platform / Windows Hypervisor Platform: all enabled ✅
Group policy restriction: none ✅
Error: Virtualization not available / Cowork tab non-functional

What Should Happen?

The error code shouldnt be popping up

Error Messages/Logs

Virtualization is not available
Claude's workspace requires Hyper-V, but the virtualization service isn't responding. Restart your computer to resolve this.

Steps to Reproduce

I just clicked on "Cowork" tab and the error message popped up

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.6679 (f8f4ff) 2026-03-13T18:26:03.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_