Launch Outlook in safe mode by choosing one of the following options.
In Windows 10, choose Start, type Outlook.exe /safe, and press Enter.
In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.
In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.
Close Outlook, and then open it normally.