How do you fix Cannot start Microsoft Outlook Cannot open the Outlook window the set of folders Cannot be opened the information store could not be opened?

Run in safe mode Some Add-ins or custom items also may cause your issue, please try to restart your Outlook in safe mode(Windows +R>type "Outlook.exe /safe">enter) Repair your data file If your issue still exists, it may be related to your corrupted data file, please try to repair it to test.