Codex Windows desktop launch pegs all 32 cores through WmiPrvSE.exe
askxue · ghdev · 2026-07-23
What happens
Launching the Codex Windows desktop app immediately saturates all 32 logical processors, making the machine effectively unusable. Closing the app is the only way to recover.
Observed cause
The visible top CPU consumer is WMI Provider Host (WmiPrvSE.exe), not the renderer itself, suggesting a regression or runaway diagnostic/sampling path.
Environment
- Package: OpenAI.Codex26.715.10079.0x64
- OS: Windows 11 Pro x64 build 10.0.26200
- CPU: AMD Ryzen 9 7945HX with 32 logical processors
- Reproduced on app launch without starting any agent task
Expected behavior
Background diagnostics or process sampling should be bounded, low-frequency, cancellable, and back off after failures.
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