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claude-code - 💡(How to fix) Fix Error: VM starts successfully (HCS shows success) but Linux kernel never boots, [1 comments, 2 participants]

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anthropics/claude-code#45530•Fetched 2026-04-09 08:03:15
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Matt73DMatt73D
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github-actions[bot]github-actions[bot]Matt73DMatt73D
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Error Message

Include the following in your report:

Device: Snapdragon X X126100 (ARM64) OS: Windows 11 Pro Claude version: 1.1348.0.0 arm64 Error: VM starts successfully (HCS shows success) but Linux kernel never boots, coworkd log frozen at last successful session, all subsequent VM starts produce no coworkd output Steps already tried: full LocalCache wipe, HNS network rebuild, sessiondata.vhdx deletion, service restart, clean reinstall

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report. This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

Fix Action

Fix / Workaround

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report. This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report. This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.


Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report.
This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

Code Example

Include the following in your report:

Device: Snapdragon X X126100 (ARM64)
OS: Windows 11 Pro
Claude version: 1.1348.0.0 arm64
Error: VM starts successfully (HCS shows success) but Linux kernel never boots, coworkd log frozen at last successful session, all subsequent VM starts produce no coworkd output
Steps already tried: full LocalCache wipe, HNS network rebuild, sessiondata.vhdx deletion, service restart, clean reinstall

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report.
This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Include the following in your report:

Device: Snapdragon X X126100 (ARM64) OS: Windows 11 Pro Claude version: 1.1348.0.0 arm64 Error: VM starts successfully (HCS shows success) but Linux kernel never boots, coworkd log frozen at last successful session, all subsequent VM starts produce no coworkd output Steps already tried: full LocalCache wipe, HNS network rebuild, sessiondata.vhdx deletion, service restart, clean reinstall

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report. This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

What Should Happen?

Claude cowork should launch.

Error Messages/Logs

Include the following in your report:

Device: Snapdragon X X126100 (ARM64)
OS: Windows 11 Pro
Claude version: 1.1348.0.0 arm64
Error: VM starts successfully (HCS shows success) but Linux kernel never boots, coworkd log frozen at last successful session, all subsequent VM starts produce no coworkd output
Steps already tried: full LocalCache wipe, HNS network rebuild, sessiondata.vhdx deletion, service restart, clean reinstall

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report.
This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

Steps to Reproduce

Include the following in your report:

Device: Snapdragon X X126100 (ARM64) OS: Windows 11 Pro Claude version: 1.1348.0.0 arm64 Error: VM starts successfully (HCS shows success) but Linux kernel never boots, coworkd log frozen at last successful session, all subsequent VM starts produce no coworkd output Steps already tried: full LocalCache wipe, HNS network rebuild, sessiondata.vhdx deletion, service restart, clean reinstall

Also search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" as there may already be an open issue you can add your details to, which gets more attention than a new report. This is a known rough area for Cowork on Windows and Anthropic is actively patching it. Filing the issue is the most productive next step given where we are.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

Version 1.1348.0 (efa3fd)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Trouble w/ Claude chat in browser.

extent analysis

TL;DR

The issue is likely related to a known problem with Cowork on Windows ARM64 devices, and filing this issue or adding to an existing one may help Anthropic prioritize a patch.

Guidance

  • Search existing issues for "ARM64 Windows cowork" or "Snapdragon cowork" to see if there's an open issue that you can add your details to, which may get more attention.
  • Consider waiting for an update from Anthropic, as they are actively working on patching this known issue.
  • If you haven't already, try checking the coworkd logs for any error messages that might provide more insight into the problem.
  • Since this is a known rough area for Cowork on Windows, it might be helpful to try a different version of Claude or a different platform to see if the issue persists.

Notes

The issue seems to be specific to Windows ARM64 devices, and the fact that the Linux kernel never boots suggests a low-level problem. Without more information or logs, it's difficult to provide a more specific solution.

Recommendation

Apply workaround: Wait for an update from Anthropic or try adding to an existing issue, as they are actively working on patching this known issue.

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#api#indexing error#inference speed#output truncation#response parsing

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