The only problems I've run into so far have been user errors mostly related to leaving partially installed AV on their system.
Yes u are right it seems AVG, Norton, and ZoneAlarm still in system not completely removed will cause problems. I used the installer Programs found in this forum and used them. That did resolve most problems with my PC and with Avast Pro IS.
We Have been a proud user of Avast Free for many years and would not take anything for Avast Pro 5 IS. I hope i am naming this correct but i love this av and will never go to any other as long as it is in service and i am still using a PC.
One PC with XP no problems. One PC with Windows7 no problems. This PC however using XP Media Center Edition, well allot of problems but found it is not Avast. It was related to the Windows updates, and old versions of AV's that were uninstalled but not completely removed. Man what a difference that made, its like a new PC again.
Thanks to all of u on this forum for your help and guidance through many problems. I was guilty of blaming Avast at first did send DMP logs to Avast, and they did reply and answer very fast. It was just as the new build was going to be released, so i did as they said and waited and upgraded.
Wow we LOVE Avast, and Wow we love this Forum and its members