Microsoft Outlook runs using a single file type that stores all the info for your mail, contacts, calendar, etc. This is all kept in a PST file. However, if that file gets damaged you’re up the proverbial creek. The good news is that it’s quite possible to repair most PST files when they get corrupted. For example, if your PST file gets too big then Windows can’t handle it (Windows doesn’t like files over 2gb). In our Stellar Outlook PST Repair review we discuss a program that can definitely help you get your PST file working again after a variety of malfunctions.