Outlook 2013 Keeps crashing, about one a week, and Microsoft OffCat says it is due to MsouPlug.OutlookPlug which appears to be Norton Antispam. I have disabled it in Outlook but it appears that Norton Antispam is automatically re-enabling itself. What is the problem and how is it corrected and why does this continue with Norton. I am running Windows 10 and Norton 360. I had the same problem with Windows 7.