As an administrator you are often called upon to upgrade Office and other Microsoft products for your end users. You also know that getting error messages are part of the process and that very few upgrades are smooth.

One of the error messages you may receive, after upgrading Office XP, is an error message indicating that MAPI was unable to load the information service Pstprx.dll.

This can happen if you were upgrading and you were also using Microsoft Outlook in Internet Mail Only (IMO) mode. If you remove Office XP and then revert back to Microsoft Office and then try your upgrade again you might receive a MAPI error message when you attempt to restart Outlook. Oftentimes this happened with upgrades involving Microsoft Office 2000, Outlook 2000 and Outlook 2002.

Continue reading How to fix loading of Information Service Pstprx.dll