Hi Bernie.... I used both
AVG Free and
AVAST! Free on different machines.... I was going to change from AVG to the
AntiVir program, as it is the top rated of the 3 different top of the line products... In independant testing
AntiVir was #1, followed not too far back by AVAST! ....
AVG was rated quite a bit further down the test results, but still adequate.........
I'm on cable connection, was also paying Earthlink a small monthly fee to have available dial up while traveling and to keep an old email address for some reason (gets ton of spam), but never used the dial-up since WiFi is so readily available... My cable comes with F-Secure Suite which is rated at the top of the pay programs, and I figured "Gee, I'm paying for it anyways...so why am I not using it?"...duhhh.... OK, OK - the brain cells are not quite as quick as they were a few years ago (many few years at that

)
AVAST! for Home, the free one, updates almost every day.. works in the background.. and is really very simple to use..... I wanted to try
AntiVir because it was so highly rated in independant testing (I notice you don't see a lot of listings about it, but I think that is because they don't pay to advertise on abundant sites like Norton/Symantec or McAfee and that is why I don't trust some sites for their rankings -- I just have this thing against payola and graft....just a personal hang-up..sorry

). I have read that AntiVir may not update as frequently as AVAST!, but I don't know that without trying it out... Should my cable stop offering F-Secure, I am certainly going to give Anti'Vir a try.... I went to their website, as the one you linked, and it was a bit hard to understand at first (the Dutch language).... then I saw the language down arrow, selected English, and ...well, I did mention the brain cells slowing down a bit???

I would recommend a trial of
AntiVir (since price is right) to be sure it doesn't use to many resources and to be sure it stays updated......... and then if not satisfied, delete and install
AVAST!.... AVG is still a good AV program, lots of family and friends use it as it is great for dial-up accounts, using negligable resources.... but
AVAST! For Home was no problem resource wise, as far as I could see, and I notice that in testing, it rated higher than Norton and McAfee pay programs, and it's price is good at $0.00 USD........