Kaspersky Internet Security works for me.
I used to think anti-virus was aload of crap.
Until the recent spate of server hacks.
You can be as careful as you like and not download a bean,
but still be caught out when you visit a website that has been hacked
or once that has been designed to pull in a trojan via iframe or encrypted javacript.
Kaspersky will detect the downloand and delete it - dead.
Kaspersky is very powerful it even rip out offending code from html files in a zip!
Just went to a guru site offering 'gifts' - KIS detect a whole pile of iframer stuff going on. May be it's just tracking stuff but it's totally out of order!
Beware of PLR gifts or from 'gurus' that hidden a lot of their crap inside.
Open html file in notepad and check through before uploading sales pages etc...
They are called trojans for a reason!
You can't be be cheap on this!
Your time is money etc...
Get Acronis make regular "safe image" backups of your c: drive as back up.
do it even time you install some major app. or a some blackhat script.
This has saved me many a time!
Use window system restore for c drive -
AVG and Kaspersky cannot be on same computer. Kaspersky will ask you to uninstall AVG first.
Choose KIS over AVG
that's my 2 cents...