Windows desktop app crashes on launch with code=3221225477

Environment:

• Windows desktop app downloaded from the official Codex Windows download page
• Also reproduced with Microsoft Store version
• Windows account: local Administrator
• WSL is installed but no Linux distro is configured for use
• Tried both native sandbox modes:

• [windows] sandbox = "elevated"
• [windows] sandbox = "unelevated"

Observed behavior:

• App crashes immediately on launch before usable UI appears
• Error shown:

• code=3221225477
• sometimes Most recent error: None
• previously also saw Most recent error: write EPIPE

Additional evidence:

• C:\Users\Administrator\.codex is created
• files like logs_2.sqlite and state_5.sqlite exist
• no .sandbox directory is created, so there is no sandbox.log

Reproduction:

1. Install Codex Windows desktop app from official website or Microsoft Store
2. Launch app
3. Crash happens immediately