Outlook 2007 Add-in error on start-up.
When I migrated files from my old system (XP) to the new one (Win7), I copied everything in my Outlook folder “c:\Documents and Settings\Wraith\Local Settings\Application Data\ Microsoft\Outlook” (if I remember correctly) and dropped them straight into the new folder “C:\Users\Wraith\AppData\Local\Microsoft\Outlook\”. This preserved all of my emails and my address book. It also preserved my association with Symnatec Corporate Anti-Virus. I kept getting errors everytime I loaded Outlook that the AV add-in couldn’t be found.
After looking for a solution online, I learned that deleting the extend.dat file would resolve the problem. Being the most trusting person on the planet, I renamed the file and restarted Outlook. No error. Cool. So there it is…
Delete or rename the extend.dat file if you are having problems with add-ins. Of course, this nukes all of your add-ins, but Outlook (re)associated the new anti-virus package when it started up.
Fixed.
Here’s the exact syntax…
c:\> rename “C:\Users\Wraith\AppData\Local\Microsoft\Outlook\extend.dat” “C:\Users\Wraith\AppData\Local\Microsoft\Outlook\extend.dat.old”
Hope that helps.
