Outlook PST file is most important files because it stores all your Emails, attachments, contacts, memos, calendar, etc. If something goes inappropriate with Outlook PST file due to any reason such as sneaky virus, unexpected shutdown of Outlook, exiting Outlook improperly etc., then there is 100 % probability to face this 0x80040600 error code. This error is applicable for all Microsoft Outlook versions 2013, 2010, 2007, 2003, and 2002 on Windows 8 , 7, XP or Vista