I apologize if this has already been answered in this forum before. Yesterday, I started getting an error saying "Sorry, We're having trouble starting Outlook. Only one version of Outlook can run at a time. Check to see if another version of Outlook is running, or try restarting your computer".
This just started showing up yesterday. There are no other programs running, and I get this message even after a clean start. I did the repair, and reinstall of Office 365. Still the same thing.
I am running Windows 8.1. Help!