[Windows] Infinite loading when switching projects: No Connect transport provider registered / EverythingProvider timeout

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Hey, this is a known issue on Windows. The extension host cursor-socket sometimes doesn’t finish starting up in time, and anything that relies on it like Tab, Agent, Indexing, Auth UI fails with these timeouts. The main thread with diagnostics is here: Timeout waiting for EverythingProvider Error

A few things to check for your case:

  1. Update Cursor. 2.6.22 is very old, the latest stable is 3.3.x: Cursor · Download. Some fixes and better diagnostics were added later.

  2. Is it project-specific? You said it hangs only on one project. Try opening a different project or a new empty folder. Does that load fine? If yes, it’s likely a workspace state issue. Close Cursor and delete that project’s storage, make a backup first:

%APPDATA%\Cursor\User\workspaceStorage\

Find the folder for that project by checking workspace.json inside, then delete that folder. Cursor will recreate the storage.

  1. If it hangs globally on any project, follow the steps from the main thread:
  • Check what’s inside C:\Program Files\cursor\resources\app\extensions\cursor-socket\
  • Start with an isolated extensions folder: cursor --disable-extensions --extensions-dir C:\cursor-clean-ext
  • Check AV or EDR software like Trend Micro, 360, Forcepoint. In corporate setups it often blocks security-related components. Your IT team can add exclusions for C:\Program Files\cursor\ and the cursor.exe and cursor-socket processes.

If it still hangs after the update and steps above, please share the latest session folder from %APPDATA%\Cursor\logs\, especially main.log and the logs under window1 or window2, and tell me what security agent is installed. The logs should show where it gets stuck.