[BUG] Claude Cowork cannot launch

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?

Virtualization is not availableClaude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding. Restart your computer to resolve this.

OS: Windows 10 Pro 22H2 (Build 19045)
Hyper-V: Enabled, vmcompute + vmms both Running
Error：Cannot create system since Hyper-V is not installed on the host (HRESULT 0x80370102)
Reinstalled and issue still exists

What Should Happen?

Claude Cowork should run

Error Messages/Logs

Virtualization is not availableClaude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding. Restart your computer to resolve this.

Steps to Reproduce

Virtualization is not availableClaude's workspace requires Virtual Machine Platform, but the virtualization service isn't responding. Restart your computer to resolve this.

OS: Windows 10 Pro 22H2 (Build 19045)
Hyper-V: Enabled, vmcompute + vmms both Running
Error：Cannot create system since Hyper-V is not installed on the host (HRESULT 0x80370102)

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Version 1.1.9493 (b58a0b)

Platform

Other

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

rk_vm_node.log" -Tail 40
2026-03-30 12:32:47 [info] [VM:steps] create_vm_config started
2026-03-30 12:32:47 [error] [VM:start] VM boot failed: HCS operation failed: failed to create compute system: HcsWaitForOperationResult failed with HRESULT 0x80370102: {"Error":-2143878910,"ErrorMessage":"The virtual machine could not be started because a required feature is not installed.","ErrorEvents":[{"Message":"Cannot create system 'cowork-vm-dadaf9be' since Hyper-V is not installed on the host.","Provider":"17103e3f-3c6e-4677-bb17-3b267eb5be57","EventId":11008,"Data":[{"Type":"String","Value":"cowork-vm-dadaf9be"},{"Type":"String","Value":"%%2151088386"},{"Type":"String","Value":"0x80370102"}]}]}
2026-03-30 12:32:47 [error] [VM:start] HCS error detected, available=true, missing=[], sentinel=HYPERVISOR_SERVICE_ERROR
2026-03-30 12:32:47 [info] Dispatching startup error: HYPERVISOR_SERVICE_ERROR
2026-03-30 12:32:47 [error] [VM:start] Startup failed: Error: HYPERVISOR_SERVICE_ERROR
at ldn (C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:1070:4545)
at async Object.startVM (C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:6527:41964)
at async C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:3:305284
at async Session.<anonymous> (node:electron/js2c/browser_init:2:116443) {
[stack]: [Getter/Setter],
[message]: 'HYPERVISOR_SERVICE_ERROR'
}
2026-03-30 12:32:47 [warn] [VM:start] Heartbeat restart failed, leaving VM offline (will retry on next app launch)
2026-03-30 12:32:47 [info] [KernelBugMonitor] State reset
2026-03-30 12:32:47 [info] [VM:start] Beginning startup, bundlePath=C:\Users\Jack\AppData\Roaming\Claude\vm_bundles\claudevm.bundle
2026-03-30 12:32:47 [info] [VM:start] Bundle version: fb30784dadb34104626c8cf6d8f90dd47cd393cc
2026-03-30 12:32:47 [info] [VM:start] VM instance ID: 1402230d-6d36-4e82-9f91-b4eb79629c0a
2026-03-30 12:32:47 [info] [VM:steps] download_and_sdk_prepare started
2026-03-30 12:32:47 [info] [VM:steps] download_and_sdk_prepare completed (5ms)
2026-03-30 12:32:47 [info] [VM:steps] load_swift_api started
2026-03-30 12:32:47 [info] [VM:steps] load_swift_api completed (0ms)
2026-03-30 12:32:47 [info] [VM:start] Copying smol-bin.x64.vhdx to bundle: C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\smol-bin.x64.vhdx -> C:\Users\Jack\AppData\Roaming\Claude\vm_bundles\claudevm.bundle\smol-bin.vhdx
2026-03-30 12:32:47 [info] [VM:start] smol-bin.x64.vhdx copied successfully
2026-03-30 12:32:47 [info] [VM:start] Configuring Windows VM service...
2026-03-30 12:32:49 [info] [VM:start] Windows VM service configured
2026-03-30 12:32:49 [info] [VM:steps] create_network started
2026-03-30 12:32:49 [info] [VM:steps] create_network completed (0ms)
2026-03-30 12:32:49 [info] [VM:steps] create_vm_config started
2026-03-30 12:32:49 [error] [VM:start] VM boot failed: HCS operation failed: failed to create compute system: HcsWaitForOperationResult failed with HRESULT 0x80370102: {"Error":-2143878910,"ErrorMessage":"The virtual machine could not be started because a required feature is not installed.","ErrorEvents":[{"Message":"Cannot create system 'cowork-vm-dadaf9be' since Hyper-V is not installed on the host.","Provider":"17103e3f-3c6e-4677-bb17-3b267eb5be57","EventId":11008,"Data":[{"Type":"String","Value":"cowork-vm-dadaf9be"},{"Type":"String","Value":"%%2151088386"},{"Type":"String","Value":"0x80370102"}]}]}
2026-03-30 12:32:49 [error] [VM:start] HCS error detected, available=true, missing=[], sentinel=HYPERVISOR_SERVICE_ERROR
2026-03-30 12:32:49 [info] Dispatching startup error: HYPERVISOR_SERVICE_ERROR
2026-03-30 12:32:49 [error] [VM:start] Startup failed: Error: HYPERVISOR_SERVICE_ERROR
at ldn (C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:1070:4545)
at async Object.startVM (C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:6527:41964)
at async C:\Program Files\WindowsApps\Claude_1.1.9493.0_x64__pzs8sxrjxfjjc\app\resources\app.asar\.vite\build\index.js:3:305284
at async Session.<anonymous> (node:electron/js2c/browser_init:2:116443) {
[stack]: [Getter/Setter],
[message]: 'HYPERVISOR_SERVICE_ERROR'
}
2026-03-30 12:32:49 [warn] [VM:start] Heartbeat restart failed, leaving VM offline (will retry on next app launch)
PS C:\WINDOWS\system32>