Step 1: Close your Microsoft Outlook, and open the Control Panel in your computer: To reset Microsoft Outlook to the factory settings (or first time run), please do as following: Now you’d better reset your Microsoft Outlook to the factory settings (or first time run).

These custom settings may affect your daily work or even make your Outlook collapse. Since a long time, you may have made so many custom settings in Microsoft Outlook that you can’t reset to the default settings easily. How to reset to factory settings (first time run) in Outlook?