Windows regression in Codex CLI — version 0.105+ crashes with HW capability error (0x20000000)

Resolved 💬 2 comments Opened Mar 4, 2026 by joydeepdash Closed Mar 4, 2026
💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What version of Codex CLI is running?

0.107.0

What subscription do you have?

Go

Which model were you using?

_No response_

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What terminal emulator and version are you using (if applicable)?

Powershell

What issue are you seeing?

Error message (on launch):
Fatal Error: HW capability found: 0x178BFBFF 0xFED8320B, but HW capability requested: 0x20000000 0x00.

What steps can reproduce the bug?

My setup:

• AMD Ryzen 7 5800HS

• Node 20 LTS (via nvm-windows)

• Windows 11 PowerShell

What I found:

• 0.98.0 works

• 0.103.0 works

• 0.104.0 works

• 0.105.0 breaks

• 0.106.0 breaks

• 0.107.0 (latest) breaks

What is the expected behavior?

_No response_

Additional information

Looks like something in 0.105.0’s binary build introduces a CPU feature requirement that isn’t valid on some Windows environments.

View original on GitHub ↗

2 Comments

github-actions[bot] contributor · 5 months ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

  • #12899
  • #12962

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etraut-openai contributor · 5 months ago

We're tracking this in #12962