[BUG] Cowork regression: VM classified as "yukonSilver not supported" after working correctly for 7 days (Win 11 Pro x64, Hyper-V enabled)

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?

Equipo: Dell Latitude 5440, Intel 13th Gen, 32 GB RAM
OS: Windows 11 Pro Build 26200
Versión de Claude Desktop: 1.1.3918 (la más reciente)
Las 3 features habilitadas y vmcompute corriendo
Cowork funcionó del 13 al 20 de febrero, y dejó de funcionar tras un evento "API UNREACHABLE" que disparó la reclasificación a "yukonSilver not supported"
Error actual: [startVM] VM not supported (win32/x64), skipping

What Should Happen?

Cowork debería funcionar conectándose a la virtualización correctamente.

Error Messages/Logs

La virtualización no está habilitada
El espacio de trabajo de Claude requiere virtualización de hardware (Hyper-V). Habilita la virtualización en la configuración BIOS/UEFI de tu computadora y luego reinicia.

Archivo de log:
2026-02-21 01:25:32 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 01:25:35 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:25:35 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 01:25:35 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 01:25:35 [info] [VM] Module loaded successfully
2026-02-21 01:25:35 [info] [Callbacks] VM event callbacks initialized
2026-02-21 01:25:36 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:25:39 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:25:44 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:30:48 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:30:50 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:30:53 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:30:57 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:38:50 [info] [stopVM] stopping VM gracefully
2026-02-21 01:38:52 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 01:38:55 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:38:55 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 01:38:55 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 01:38:55 [info] [VM] Module loaded successfully
2026-02-21 01:38:55 [info] [Callbacks] VM event callbacks initialized
2026-02-21 01:38:56 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:38:59 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:39:04 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:39:23 [info] [stopVM] stopping VM gracefully
2026-02-21 01:39:49 [info] [stopVM] stopping VM gracefully
2026-02-21 01:41:22 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 01:44:20 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:44:20 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 01:44:20 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 01:44:20 [info] [VM] Module loaded successfully
2026-02-21 01:44:20 [info] [Callbacks] VM event callbacks initialized
2026-02-21 01:44:22 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:44:24 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:44:29 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:44:55 [info] [stopVM] stopping VM gracefully
2026-02-21 01:45:13 [info] [stopVM] stopping VM gracefully
2026-02-21 01:45:15 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 01:45:19 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:45:19 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 01:45:19 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 01:45:19 [info] [VM] Module loaded successfully
2026-02-21 01:45:19 [info] [Callbacks] VM event callbacks initialized
2026-02-21 01:45:21 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:13 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 01:46:17 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:17 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 01:46:17 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 01:46:17 [info] [VM] Module loaded successfully
2026-02-21 01:46:17 [info] [Callbacks] VM event callbacks initialized
2026-02-21 01:46:19 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:22 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:26 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:41 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:42 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:45 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:46:50 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:47:08 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:47:10 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:47:13 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 01:47:17 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:35:39 [info] [cleanupVMBundleIfUnsupported] yukonSilver not supported (status=unsupported), checking for stale bundle...
2026-02-21 21:35:44 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:35:44 [info] [Callbacks] Initializing VM event callbacks...
2026-02-21 21:35:44 [info] [VM] Loading vmClient (TypeScript) module...
2026-02-21 21:35:44 [info] [VM] Module loaded successfully
2026-02-21 21:35:44 [info] [Callbacks] VM event callbacks initialized
2026-02-21 21:35:48 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:36:06 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:36:08 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:36:11 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:36:15 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:38:11 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:38:12 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:38:15 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:38:20 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:43:12 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:43:16 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:43:19 [warn] [startVM] VM not supported (win32/x64), skipping
2026-02-21 21:43:24 [warn] [startVM] VM not supported (win32/x64), skipping

Steps to Reproduce

1. Abrir secckón de Cowork

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.50

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_