Hi All,
I installed Avast4, what I thought was the free version, but now get a pop up asking for a serial key, which I don’t have, and Outlook2000 keeps crashing after getting a message saying the avast engine won’t start. What gives…?
downdogWoof…
OK, this is a bug that will be fixed in the next update. 
Meanwhile, please take a demo key from http://www.avast.com/keys.txt (e.g. the first one, starting with the “S”) and insert it to the program (just run it from the start menu, it will ask you for a key).
After you do this, please register your copy of avast (go to www.avast.com and select Support → avast! Home Registration) to get your own key. It will be sent to you via e-mail.
Sorry for the inconvenience,
Vlk