This is a classic problem in avast!.
The easiest way to work it around is to quit Outlook, search your system drive for a file called “extend.dat” and delete it (or, if you’re paranoid and don’t want to delete, just rename it).

That should solve the problem. :wink:

FYI, the extend.dat file is a cache that Outlook builds from registry information so that it doesn’t have to read all the settings from the registry every time it starts. Deleting the file causes Outlook to recreate this file, taking into account the changes avast! setup made to the appropriate reg keys…

Hope this helps,
Vlk