Hey, this is a known Windows auto-updater bug. The update process has two phases: uninstall the old version, then install the new one. If something interrupts it between phases like a system restart or antivirus holding file handles, Cursor can end up fully uninstalled with no rollback. Details and discussion here: Cursor uninstalled itself and didn’t install afterwards continued
What you can do now:
- Download and reinstall Cursor from Cursor · Download
- To prevent it from happening again, open
File > Preferences > Settings, findupdate.mode, and set it tonone. You’ll need to install updates manually, but Cursor won’t disappear anymore. - Before rebooting Windows, make sure Cursor is fully closed, including the tray icon.
This bug is known and being tracked, but I can’t give an exact ETA for a fix yet. If you notice a pattern like it only happens after an update, or it also happens after a normal restart, let me know. It’ll help.