When Outlook automatically closes after opening, it’s often due to a corrupt PST file or faulty add-ins in Outlook. You can solve the issue by opening Outlook in Safe Mode. Then, disable all add-ins from the Options menu. Still not working? Your PST file may be corrupted. Yota PST Converter is a reliable tool that can repair and restore damaged PST files without Outlook. Lastly, try creating a new Outlook profile and ensure the application is up to date. These steps generally fix the issue for most users.