[BUG] Windows 1.6608.2 - OOM crash at startup, V8 heap out of memory, vhdx already extracted

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?

Platform: Windows 11 (10.0.26200), x64
App version: 1.6608.2 (MSIX)
Account: Pro individual
What's wrong:
Claude Desktop closes silently ~10 seconds after launch. No error dialog. The main process (claude.exe PID) climbs from ~200 MB to 3.4 GB RAM then crashes with OOM.
Exact error from Claude.exe output:
OOM error in V8: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
Root cause identified:
The app attempts to extract/load rootfs.vhdx.zst (2.2 GB compressed, 9.4 GB extracted) into memory at every launch, even when the extracted rootfs.vhdx already exists in vm_bundles\claudevm.bundle\.
Steps already tried:

Clean uninstall + reinstall (multiple times, including safe mode cleanup of Helium files)
Manually downloaded and extracted rootfs.vhdx (9453961216 bytes) to the correct path
Killed all orphan processes before launch
WSL2 enabled, 32 GB RAM, no VPN, no antivirus

Additional observations:

App works fine with a Free account (stays open)
App crashes with Pro account specifically
logs\main.log is never created (crash happens before initialization)
Last working version was the day before (May 9, 2026)

What Should Happen?

claude should open

Error Messages/Logs

Steps to Reproduce

Clean uninstall + reinstall (multiple times, including safe mode cleanup of Helium files)
Manually downloaded and extracted rootfs.vhdx (9453961216 bytes) to the correct path
Killed all orphan processes before launch

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

App version: 1.6608.2 (MSIX)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_