[BUG] Failed to start Claude's workspace

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?

Failed to start Claude's workspace
HCS operation failed: failed to create compute system: HcsWaitForOperationResult failed with HRESULT 0x80070005: {"Error":-2147024891,"ErrorMessage":"","Attribution":[{"OperationFailure":{"Detail":"Construct"}}]}
Restarting Claude or your computer sometimes resolves this. If it persists, you can reinstall the workspace.

What Should Happen?

I follow all these and not fixed:
This is a Windows HCS (Host Compute Service) error — 0x80070005 means Access Denied. It's a Hyper-V/container permissions issue, not a Claude Code bug per se.

Try these steps in order:

1. Run Claude Code as Administrator

Right-click → "Run as administrator"

1. Restart the HCS service

Open an elevated PowerShell and run:

Restart-Service vmcompute
Restart-Service vmms

1. Check Hyper-V is enabled

Get-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V

If not enabled:

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All

Then reboot.

1. Check Windows Containers feature

Enable-WindowsOptionalFeature -Online -FeatureName Containers -All

1. If still failing — clean up stale compute systems

Get-ComputeProcess | Stop-ComputeProcess -Force

Or via hcsdiag.exe:

hcsdiag list
hcsdiag kill <id> # for any stale entries

1. Full reset

If nothing works, try:

Uninstall Claude Code completely
Reboot
Reinstall
The most common fix for 0x80070005 is step 2 (restarting vmcompute service) or running as admin.

If the issue persists, I'd recommend reporting it at https://github.com/anthropics/claude-code/issues with your Windows version details — it may be a known issue with specific Windows 11 builds.

Error Messages/Logs

Steps to Reproduce

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How can I help you today?

Failed to start Claude's workspace
HCS operation failed: failed to create compute system: HcsWaitForOperationResult failed with HRESULT 0x80070005: {"Error":-2147024891,"ErrorMessage":"","Attribution":[{"OperationFailure":{"Detail":"Construct"}}]}
Restarting Claude or your computer sometimes resolves this. If it persists, you can reinstall the workspace.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Version 1.1.8629 (befdfc)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_