Codex Desktop frequently becomes unresponsive after updating to latest version on Windows

[imSPS]

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

Codex application release reported internally: 26.715.21425

What subscription do you have?

Plus

What platform is your computer?

• Windows 10 x64 - OS build: 10.0.19044.7548

What issue are you seeing?

Codex Desktop has started freezing frequently after I updated to the latest Windows version. The previous version worked normally on the same machine.

When the issue occurs, the entire Codex window becomes unresponsive. Windows may show “Codex is not responding,” and I have to wait or close and restart the application.

At first I suspected that the input method might be involved because the freeze sometimes occurs while typing. However, Windows Event Viewer shows multiple application hang events for Codex itself, while ctfmon.exe and TextInputHost.exe remain responsive and have no related error events.

Version

• Codex package version: 26.715.2305.0
• Codex application release reported internally: 26.715.21425
• Electron/Chromium executable version: 150.0.7871.124
• Installation/update time: July 17, 2026

The freeze is not completely deterministic, but it has happened repeatedly since the update.

Actual behavior

The entire Codex window intermittently becomes unresponsive. Windows records it as an application hang involving:

Application: ChatGPT.exe
Package: OpenAI.Codex_26.715.2305.0_x64__2p2nqsd0c76g0
Event: AppHangTransient / MoAppHang
Application version: 150.0.7871.124

Recorded occurrences include:

2026-07-17 18:45:18 - Application Hang, Event ID 1002
2026-07-18 00:17:56 - AppHangTransient
2026-07-18 00:39:03 - AppHangTransient

There were no corresponding crashes or hangs reported for ctfmon.exe or TextInputHost.exe.

What steps can reproduce the bug?

1. Update Codex Desktop to 26.715.2305.0.
2. Open an existing workspace containing several long-running tasks.
3. Use Codex normally, including switching between tasks and typing in the composer.
4. After some time, the entire application intermittently stops responding.

What is the expected behavior?

Codex Desktop should remain responsive during typing, task switching, and long-running conversations just like the previous version.

Additional information

The system still had approximately 29 GB of free memory, so this does not appear to be system-wide memory exhaustion.

This looks like a Codex Desktop UI/Electron responsiveness regression introduced by the latest update. The available Windows logs point to Codex itself hanging rather than the input method crashing.

[github-actions]

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

• Windows desktop app becomes unresponsive when switching tasks across Projects #33839
• Windows Codex Desktop 26.715.2305.0 hangs while rendering ~200 KB tool output #33822

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[jwbats]

Mine is freezing non stop on every minor action.

Want to resize the window?

Tough nuts. We're gonna hang. Gotta wait for 2 minutes.

Click the input for focus?

Nope. Hanging for another 2 minutes.

Repairing, resetting, reinstalling didn't work.

I'm currently using Codex from VSCode, because the app has me completely locked out.

[sargearmstrong]

I too am experiencing this immediately after updating yesterday evening. It hangs for roughly ~1 minute every ~10 seconds. I turned off all SSH / remote connections, and all settings about "recommended work" - but no go, still problematic.

[edgarwideman]

Same, it's almost unusable. It freezes exactly every 60 seconds, for about 10 seconds.

[silverleafsolutions]

Experiencing the same as everyone else here with ChatGPT for Windows Version 26.715.21425, Released Jul 16, 2026.

Windows 11 Pro, version 25H2, build 26200.8875

ChatGPT Codex causes Windows to stutter and lag for around 5-10s at a time, like every 30-60s or so. I ran a Performance Trace in Codex during one of the stutters and submitted a bug report in the app with Feedback ID: 019f707a-1e81-7053-89ab-d068d53773da.

Update 7/18: I updated to "Version 26.715.31925, Released Jul 17, 2026", and it's still stuttering badly.

[softnerdrd]

I am experiencing the same issue on Windows.

Reported by: Iván Óscar Sosa Marinangeli
Subscription: ChatGPT Plus
Codex package: OpenAI.Codex_26.715.2305.0_x64__2p2nqsd0c76g0
Executable version: ChatGPT.exe 150.0.7871.124

The application freezes and stops responding even after:

• completely uninstalling and reinstalling the Microsoft Store app;
• signing in again;
• testing with a clean/empty .codex directory;
• launching the app before restoring any previous sessions or data.

Windows Error Reporting repeatedly records both AppHangTransient and MoAppHang for ChatGPT.exe / OpenAI.Codex_26.715.2305.0_x64__2p2nqsd0c76g0.

The freeze occurs even when the application is effectively empty, so previous Codex conversations and local data do not appear to be the cause. Another desktop AI application works normally on the same computer, which further suggests that the problem is specific to the current Codex/ChatGPT Windows application build.

[DaisukeDaisuke]

According to GPT5.6 sol high, this appears to be related to Codex Micro, a gadget introduced by OpenAI
When the ChatGPT App is running or when switching tabs, it indiscriminately loads incompatible drivers and DLLs, severely slowing down the system's mouse
A workaround is to use jetbrains-cc-gui in CLion, or to use the CLI directly in the command prompt or JetBrains Terminal
My computer didn't have any anti-cheat drivers installed at all, and everything was working fine, but while Codex was running as a Windows app, everything including the mouse and window manager was lagging, which was incredibly frustrating. I won't be using the Windows app for a while

https://www.reddit.com/r/codex/comments/1uxtk61/fix_for_windows_severe_app_lag_mouse_freezing/
https://www.reddit.com/r/codex/comments/1uxpr1x/comment/oxtwwhi/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1