you have both live simultaneously. Norton has a reputation of "Not playing nice with others" (AVs). You basically need to make AVG only on demand not resident. Before running AVG scan , you have to "Unload" Norton s autoprotect feature( & possibly its setting change preventer) then run AVG. IF Avg is fully turned off (including resident & e-mail) then Norton should be able to run. Be sure to Update both. Hope this helps some. Happy