Codex Desktop for Windows 26.609.3341.0 exits immediately after launch

What version of the Codex App are you using (From “About Codex” dialog)?

26.609.3341.0

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Windows 11 x64

What issue are you seeing?

Environment

• Windows 11
• Codex Desktop: 26.609.3341.0 x64
• PackageFullName: OpenAI.Codex_26.609.3341.0_x64__2p2nqsd0c76g0
• Package status: Ok
• Installed from Microsoft Store
• Web version works normally
• OpenAI account, project, and GitHub integration work normally in the web version

Symptoms

• Clicking the Codex icon briefly shows a white window
• Sometimes only the close button is visible
• The process appears briefly in Task Manager
• The app exits within a few seconds
• No normal app UI appears

What I tried

• Repair from Windows Settings
• Reset from Windows Settings
• Full uninstall and reinstall from Microsoft Store
• Get-AppxPackage OpenAI.Codex | Reset-AppxPackage
• Removed/renamed Codex cache folders under AppData and LocalCache
• Renamed ~/.codex
• Removed/renamed %LOCALAPPDATA%\OpenAI\Codex\bin
• Repaired Microsoft Edge WebView2 Runtime
• WebView2 version: 149.0.4022.62
• Disconnected USB display adapter
• Fresco Logic IDDCX Adapter no longer appears after disconnecting
• Windows Security protection history shows no recent actions
• Controlled folder access is off
• Firewall/Defender did not appear to block Codex

Observed logs/events

• Windows Error Reporting shows LiveKernelEvent 141
• Codex log files are created under:

%LOCALAPPDATA%\Packages\OpenAI.Codex_2p2nqsd0c76g0\LocalCache\Local\Codex\Logs
but they are very small, around 328 bytes

• Launching Codex.exe directly with logging shows it reaches:

[AppServerConnection] Starting app-server connection hostId=local transport=stdio
[remote-connections/window-context] refresh_started previousConnectionCount=0
then exits

GPU

• NVIDIA GeForce RTX 4060
• DriverVersion: 32.0.15.9186
• DriverDate: 2026/01/20

Additional notes

• The app worked normally until the previous day.
• After Windows System Restore, Codex launched once, but after reboot it failed again.
• After Windows app repair, it may temporarily open, but the issue returns.

What steps can reproduce the bug?

1. Install Codex Desktop from Microsoft Store.
2. Launch Codex from the Start menu or with:

explorer.exe shell:AppsFolder\OpenAI.Codex_2p2nqsd0c76g0!App

1. A white window appears briefly.
2. The app exits within a few seconds.
3. The normal app UI is not shown.

What is the expected behavior?

Codex Desktop should open normally and show the main app window.

Additional information

The web version works normally. The issue started suddenly after Codex Desktop had worked normally the previous day. After Windows app repair or system restore, the app may open once temporarily, but the issue returns after reboot.