The users witness issues and so they put up questions like Why won't outlook open or open in safe mode. To open Outlook in safe mode, you are supposed to press and hold the Ctrl key and then select the Outlook shortcut. Then in the warning dialog which appears, you should confirm that you want to open Outlook in safe mode just by choosing yes. Once you do apply the steps, you will be able to resolve the issues without any fuss. Just have a look at the steps to troubleshoot the issue without any fuss.
Also Read - Outlook not receiving emails Best Netgear Nighthawk Router Netgear modem lights Why is my AT&T Account Locked? Why is my Mac not finding my wireless printer? How to change printer settings on tablet? Windows office 365 download HP Deskjet 3630 ink HP printer not connecting to wifi How to remove a google account from a chrome browser