Try to open MS Outlook in safe Mode. Know how to open Outlook in Safe Mode.
Press “Start” + “R” key (Combination) >> Type “outlook.exe<space>/safe” in run dialog box without quotes.
If Outlook opens in safe mode, then remove add-ins from Outlook. To do so: Go to ‘File’ Tab >> ‘Options’ >> ‘Add-Ins’ >>Choose ‘Com Add-ins’ and hit on ‘Go’ >> Uncheck all checked options >>hit on ‘Ok’ >>Reboot Outlook in Normal Mode.