pst file is where Outlook stores messages, contacts, appointments, tasks, notes, and journal entries The PST or personal storage folder, also known as a.

If disabling Add Ins in Outlook while in Safe Mode, does not resolve the performance issues, it is most likely that a corrupted PST file or profile is causing the issue. Use scanpst.exe to fix Outlook Data File errors Uninstall or reinstall this add-in.įor more information on Add-ins and how to manage them, refer to Microsoft article, 'View, manage, and install add-ins in Office programs'ģ.

The add-in you last enabled is most likely the cause of your issue. If so, you can enable them one by one until Outlook fails again. After this, you can start Outlook normally again and see if it works now. At the bottom, where it says 'Manage', click Go and in the next screen, remove the check marksĭisable all your add-ins. In Outlook, click File, Options, then click Add In’s. If Outlook is slow or locks up whilst in Safe Mode, then it is very likely that an Add In could be causing the issue. (Keep holding it until message appears), or Click Start, In the Search or Run box, type outlook.exe /safe and press Enter To start in Safe Mode, you can hold down the CTRL key when opening Outlook. Try and open Outlook in Safe Mode Try and open Outlook in Safe Mode

Outlook crashes when opening emails