Windows 11 ARM64: ChatGPT desktop app crashes immediately after automatic Codex migration (26.707.9981.0)

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

26.707.9981.0

What subscription do you have?

Pro

What platform is your computer?

• Windows 11 ARM64

What issue are you seeing?

Platform:

• Windows 11 ARM64
• Microsoft Surface (ARM)

Subscription:

• ChatGPT Team

Version:

• ChatGPT desktop build 26.707.9981.0 (automatic migration from Codex)

Expected behaviour:
App opens normally and loads Codex.

Actual behaviour:
The previous standalone Codex app worked correctly until today.
It automatically migrated to the new ChatGPT desktop app (icon changed).
Since the update, the app opens for approximately 1–2 seconds, briefly shows ChatGPT then Codex, and exits without any error dialog.

Additional information:
This appears to match reports from other Windows ARM64 users experiencing crashes after the Codex → ChatGPT migration.

What steps can reproduce the bug?

Reproduction:
100% reproducible.

Troubleshooting already attempted:

• Rebooted Windows
• Uninstalled and reinstalled from https://chatgpt.com/download
• Removed local Codex configuration
• No Application Error in Event Viewer
• App recreates .codex state successfully before exiting

What is the expected behavior?

_No response_

Additional information

_No response_