1.free 100% no advertisements to (ask.com or yahoo toolbar......)
2.free but alwil team cheat us why?because they deliver a full premium antivirus including protection for web,email,p2p,and more .best from the paid antivirus and best much more from the two free av avira and avg.(thanks a lot)
3.speed you cant dream about it with another antivirus
4.high rates of detections
5.avast web forum:maybe every vendor has one but in avast forums you can talk with the people who develop the antivirus.
6.globalization a lot of users don't know about English can download an avast! with their local language.if i create a language avast will be available in it(am kidding)
7.simple than adding files to your media player
8.behavior blocker(simple but will be more effective in the avast!5)but it still able to block a lot of viruses come with your flash driver and don't known yet for avast(it tell you the file try to put it self in windows directory and you know what to do)
9.
10.
but avast team should develop the media things in the web sites(when i enter symantec website i feel i enter the EA games NFS SECTION(make for speed) and i search for NFS carbon but i say the yellow color and i remember i am at norton site
i don't write 9&10 because my mind run slow today.complete it by your self