Outlook an extension failed to initialize extend dat



Keywords: outlook an extension failed to initialize extend dat
Description: Outlook Fails to Initialize, extend.dat ? - This is an odd problem, but I'll guess that someone has seen this! This particular system is a Dell Latitude d820, 2 GB RAM running Windows 7 Professi

3 Star Lounger Join Date Nov 2001 Location Santa Rosa, California, USA Posts 275 Thanks 0 Thanked 0 Times in 0 Posts

This is an odd problem, but I'll guess that someone has seen this! This particular system is a Dell Latitude d820, 2 GB RAM running Windows 7 Professional 32 bit. It has Office Standard 2007 installed. Tonight Outlook decided to go sideways and will not load. The other parts of Office (Word, Excel, etc) appear to work well. The initial message Outlook displays is: "Cannot start Microsoft Outlook. Cannot open the Outlook window". I did a system repair, both with the diagnostic tool and with the original install disk. I got a on-time display of the following message after the "repair":

"An extension failed to initialize. Cannot 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 the file and then click Properties to check your permissions for the folder."

So, I'm not sure where extend.dat is located. If it's in 'Users\Bob Harris\Local Settings' I've got a problem because in Win-7 I've yet to determine how to access that folder with the operating system. No matter what I do I get an "Access Denied" message.






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