Rebooting Outlook can resolve many common issues or Help 1-888-303-0967. Close the application completely by using Task Manager (Ctrl + Shift + Esc) > Processes > End Task (Outlook.exe). Restart your computer and open Outlook again. If problems persist, try running Outlook in safe mode by pressing Win + R, typing outlook.exe /safe, and hitting Enter. If Outlook still doesn’t function properly, repair the program through Control Panel > Programs > Microsoft Office > Modify > Repair. You may also reset your Outlook profile by creating a new one in Control Panel > Mail > Show Profiles > Add and setting it as the default.