Codex edit/apply crashes on Windows in VS Code Insiders with codex-command-runner.exe error 0xc0000022

What version of the IDE extension are you using?

26.5311.21342

What subscription do you have?

Plus

Which IDE are you using?

VS Code

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

Any time Codex tries to edit a file in VS Code Insiders on Windows, the edit fails and Windows shows:

codex-command-runner.exe - Application Error
The application was unable to start correctly (0xc0000022).

This appears specific to Codex edit/apply. Manual editing works, and GitHub Copilot Chat can edit the same file successfully.

What steps can reproduce the bug?

Open VS Code Insiders
Open any file
Ask Codex to make a tiny edit
Codex attempts to apply the patch
Crash dialog appears for codex-command-runner.exe
No edit is applied

What is the expected behavior?

_No response_

Additional information

Any time Codex tries to edit a file in VS Code Insiders on Windows, the edit fails and Windows shows:

codex-command-runner.exe - Application Error
The application was unable to start correctly (0xc0000022).

This appears specific to Codex edit/apply. Manual editing works, and GitHub Copilot Chat can edit the same file successfully.

Environment:

• Windows
• VS Code Insiders
• OpenAI/Codex extension
• Example workspace file: d:\txData\Qbox_979BCA.base\resources\[gravvy]\gravvy_hookies\test.lua

Repro:

1. Open VS Code Insiders
2. Open any file
3. Ask Codex to make a tiny edit
4. Codex attempts to apply the patch
5. Crash dialog appears for codex-command-runner.exe
6. No edit is applied

What works:

• Manual typing/editing in VS Code
• Copilot edit/apply in the same workspace
• Running these binaries directly from PowerShell:
• codex-command-runner.exe
• codex.exe
• codex-windows-sandbox-setup.exe

For example:

• codex-command-runner.exe --help returns runner: no request-file provided
• codex.exe --help works normally

So the binaries themselves are launchable outside the extension.

What I tried:

• Run VS Code as admin
• Restart VS Code and PC
• Compatibility mode
• sfc /scannow
• Reinstall extension
• Force redownload of codex-command-runner.exe
• Disable/re-enable sandbox
• Disable WSL
• Clear VS Code Insiders cache/storage:
• WebStorage
• Local Storage
• Service Worker
• Cache
• Code Cache
• Session Storage
• Remove legacy Codex config:

``toml
[windows]
sandbox = "elevated"
``
and restart so Codex rebuilds sandbox setup

None of the above fixed it.

Relevant logs:

• Latest Codex log:

C:\Users\jt614\AppData\Roaming\Code - Insiders\logs\20260314T212606\window1\exthost\openai.chatgpt\Codex.log

Notable log behavior:

• Codex activates and spawns app-server
• Logs unsupported internal requests such as:
• local-environments is not supported in the extension
• previously also open-in-target not supported in extension

This makes it look like the failure is in the Codex extension’s edit/apply integration path on Windows, not in the workspace files themselves.

Binary paths involved:

• C:\Users\jt614\.codex\.sandbox-bin\codex-command-runner.exe
• C:\Users\jt614\.vscode-insiders\extensions\openai.chatgpt-26.5311.21342-win32-x64\bin\windows-x86_64\codex-command-runner.exe
• C:\Users\jt614\.vscode-insiders\extensions\openai.chatgpt-26.5311.21342-win32-x64\bin\windows-x86_64\codex.exe
• C:\Users\jt614\.vscode-insiders\extensions\openai.chatgpt-26.5311.21342-win32-x64\bin\windows-x86_64\codex-windows-sandbox-setup.exe

Expected:
Codex should apply file edits normally.

Actual:
Only Codex edits crash with codex-command-runner.exe 0xc0000022; manual edits and Copilot edits succeed.