How to Fix Extend.Dat File in Outlook 2003

Outlook, as we all know, is the personal information manager for Microsoft users. These elements of the Office suite offers email communication, calendar management, task, contact management, journals and notepad. This is an all in one package for ...
Tags: outlook repair,extend.dat file

Outlook is a personal information manager produced by Microsoft as part of the Office suite. It offers a center for email communication, a calendar, task and contact manager, notepad and journal. The extend.dat file allows Outlook to cache registry entries for third party add-ins, such as a contact-verifying program. Errors occur when something...

Having trouble opening Outlook or does it crash frequently? This guide is all about solving Outlook startup and instability issues.
Tags: Microsoft, Outlook, Exchange, howto, how to, FAQ, add-ins, Outlook 2010, Outlook 2007, Outlook 2003, Outlook 2002, XP, mail, e-mail, email, message

Today out of the blue, when loading office 2003 on an xp machine, an error message appeared with the text: "An extension failed to initialize. Can't open file: extend.dat. The file may not exist, you may not have permission to open it, or it may be open in another program. Right-click the folder that contains…
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When you receive and error that Outlook can't find and add-in, the usual cause is that you uninstalled it but Outlook didn't delete the file it uses to kee