[Windows] Setup hangs at “Complete configuration” after UAC approval on Windows 11 24H2

Summary

The Windows setup gets stuck on the “Windows configuration complete” screen after the one-time UAC permission step. The app worked before a recent Windows update, but reinstalling it no longer finishes the configuration.

The setup screen is branded ChatGPT, while the problem occurs while trying to install/use the Codex Windows app.

Environment

• OS: Windows 11 Home
• Version: 24H2
• OS build: 26100.8875
• Language: Dutch
• UAC publisher: OpenAI LLC, shown as verified

Steps to reproduce

1. Install and start the Windows app.
2. The app opens a page titled “Windows-configuratie voltooien”.
3. Click “Configuratie voltooien”.
4. Windows shows the User Account Control prompt asking whether ChatGPT may make changes to the device.
5. Click “Ja”.
6. The app does not complete the setup and remains stuck on the configuration screen.

Expected behavior

After approving the UAC prompt, the app should finish the one-time Windows configuration and continue to the normal application interface.

Actual behavior

The setup does not complete. The app remains on the same configuration page, so Codex cannot be used.

Additional context

• The app previously worked correctly on this computer.
• The problem started after a Windows update.
• Reinstalling the app does not resolve it.
• A blue-screen error had occurred earlier on the system, possibly related to a graphics driver, but the current reproducible problem is the setup hanging after UAC approval.
• Screenshots are available showing both the stuck setup page and the Windows version information.

Please let me know which logs or diagnostic files would be useful to collect.