Cowork VM not provisioned after clean reinstall — "Virtualization is not enabled" despite Hyper-V working

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?

Cowork was working fine until a Windows disk cleanup removed VM-related files. After a full clean reinstall (uninstall app, delete %APPDATA%\Claude, delete %LOCALAPPDATA%\Claude, restart, fresh install from claude.ai/download), the Cowork tab shows "Virtualization is not enabled" and blocks all input. The reinstall never recreated the CoworkVMService or any VM files.

What Should Happen?

Fresh install should provision CoworkVMService and download VM bundle automatically.

Error Messages/Logs

Steps to Reproduce

Have a working Cowork installation on Windows
Run Windows disk cleanup which removes VM temp files
Cowork breaks with "Virtualization is not enabled"
Uninstall, delete all Claude AppData folders, restart, reinstall
VM service never recreated

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.47

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

systeminfo confirms "A hypervisor has been detected"
sc query CoworkVMService returns nothing
No .vhdx files on disk (only Docker)
No vm_bundles or VM folders anywhere in Claude directories
Cowork settings has no reinstall/reset option