Cursor stops working

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

As reported here: Cursor suddenly stopped working - #4 by Hans_Muster Cursor has stopped working. While last time I could fix it by clicking that button, it does not now.

Steps to Reproduce

I don’t know, it just happened again after closing cursor and opening again. Restarting Windows has not helped.

Expected Behavior

That it is working.

Operating System

Windows 10/11

Version Information

IDE: 3.0.16

Does this stop you from using Cursor

Yes - Cursor is unusable

6

Hi @Hans_Muster,

I see this is a recurrence of the issue you reported in your earlier thread, but this time Reload Window isn’t fixing it. That’s consistent with corrupted local extension host state.

Let’s try these steps in order:

Step 1 – Clear the extension cache:

  1. Close Cursor completely

  2. Open File Explorer and navigate to %APPDATA%\Cursor

  3. Delete the CachedExtensions and CachedExtensionVSIXs folders (if they exist)

  4. Relaunch Cursor

Step 2 – If that doesn’t work, do a clean reinstall:

  1. Uninstall Cursor from Windows Settings > Apps

  2. Delete these folders:

    • %APPDATA%\Cursor

    • %LOCALAPPDATA%\Programs\cursor

  3. Download and reinstall from cursor.com

Step 3 – If neither works, grab the error logs:

  1. Open Cursor

  2. Go to Help > Toggle Developer Tools

  3. Click the Console tab

  4. Look for any red error messages

  5. Right-click in the console and select Save as… to export the log, then share it here

The console output will help us understand exactly what’s failing in the extension host.

7

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image1035×340 14.3 KB

And now all my chat histories are gone?!

8

@mohitjain I followed your instructions and removed cursor completely, including losing my chat histories!

Then Cursor worked a while, now it’s back.

This will force me to stop working with cursor and use another product altogether, because it’s literally not working!

vscode-app-1777143224485.txt (50.9 KB)

9

I’ve reviewed the log file you shared. The core issue is clear: the extension host is failing to start, which takes down everything else (terminal, git, agent, auth).

The log shows an extension called openai.chatgpt throwing errors during startup about API features that don’t exist in Cursor. You also have GitHub Copilot extensions installed, which can conflict with Cursor’s built-in AI. These are the most likely cause of the repeated crashes.

Here’s what to try:

Step 1 – Confirm it’s an extension problem:

Open a terminal (Windows Terminal or cmd) and run:

"%LOCALAPPDATA%\Programs\cursor\Cursor.exe" --disable-extensions

If Cursor works normally with extensions disabled, that confirms an extension is the culprit.

Step 2 – Remove the conflicting extensions:

  1. Relaunch Cursor normally

  2. Go to the Extensions panel (Ctrl+Shift+X)

  3. Uninstall these extensions if possible:

    • OpenAI Codex (openai.chatgpt) – this is actively throwing errors in your logs

    • GitHub Copilot and GitHub Copilot Chat – these conflict with Cursor’s built-in AI features

    • Azure GitHub Copilot (ms-azuretools.vscode-azure-github-copilot)

  4. Restart Cursor

Step 3 – If Settings Sync is reinstalling them:

If the extensions keep coming back after removal, you may have Settings Sync enabled. Go to File > Preferences > Settings Sync and either turn it off or exclude extensions from syncing.

Let me know if disabling extensions resolves the crashes.