Microsoft Outlook belongs to the class of software referred to as ''Email Clients''. Part 1: Why Is Outlook Not Responding? Part 2: Eight Common Solutions to ''Outlook Not Responding'' Part 3: How to Fix Specific Not Responding Issues? Issue 1: Outlook Keeps Crashing Issue 2: Outlook Stuck on Process Issue 3: Scanpst File Not Responding Part 1: Why Is Outlook Not Responding?