[BUG] Cowork stuck at end of loading bar — VM never finishes initializing (Windows 11 Pro)

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?

Related issues: Similar to #27801 and #26646 but different symptom — VM starts but never completes initialization, no API errors, connectivity confirmed OK.

System info:
OS: Windows 11 Pro, build 26200
Device: Lenovo ThinkPad L15 Gen 2 (20X4S27300)
CPU: Intel Core i5-1135G7 @ 2.40GHz (x64)
Claude Desktop: latest version (installed March 2026)

What's wrong:
Cowork loads to the very end of the setup progress bar ("Configurando el espacio de trabajo de Claude") and never completes. Stays there indefinitely (tested 15+ minutes). Regular Chat works fine.
Troubleshooting already done:

• Uninstalled and reinstalled Claude Desktop multiple times
• Rebooted multiple times
• HypervisorPlatform was Disabled — enabled it via PowerShell, rebooted, issue persists
• Get-HnsNetwork now returns a Default Switch (172.27.176.0/20) after enabling HypervisorPlatform
• Test-NetConnection api.anthropic.com -Port 443 → TcpTestSucceeded: True
• cowork-svc process visible and running in Task Manager
• No ARM processor, no Windows Home edition

What Should Happen?

Expected behavior: Cowork workspace finishes setting up and accepts tasks.

Error Messages/Logs

Steps to Reproduce

• Open Claude Desktop on Windows 11 Pro
• Click the "Cowork" tab
• Wait for workspace setup to complete
• Progress bar reaches the very end but never finishes — hangs indefinitely (tested 15+ minutes)

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

1.1.7714.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="880" height="598" alt="Image" src="https://github.com/user-attachments/assets/87220392-9b5f-4c0e-b134-85c59ff024fe" />