AVG is most popular anti-virus in all over the world but it effects on the speed of computer. Mean to say the speed becomes sloe when you download AVG.
AVG is the ebst I ahd malware on my brand new netbook somewhere in the Microsoft Office 2010 files and it removed it almost instantly restarted my computer done just carried on as normal.
I use Avira. I used AVG from 2006-2010 but it kept using more and more of my RAM which slowed my pc all time so I removed it and started using Avira free edition.