Hello,
This is a tutorial about how to not get virusses
First you should have a good anti virus (free or paid) you can find these at protection forums
Look out for what you download, like if you type in youtube: cracked steam or something, you know these vids? cracked counterstrike cs hacks and stuff
DON'T DOWNLOAD THESE FROM YOUTUBE, they're mostly viruses, or keyloggers and stuff, never download programs that will give you unlimited money on a game, i can guarantee you, this doesn't work!
Scan files before you open them, if you open a file, you're anti virus will scan it, but it can be too late, so scan it before you open it!
If you download things on a forum, which contains a virus scan on the forum, check if it has the same name, and size, and it's never bad to scan
Don't click stuff like: $100000 totally free, download now!
not always viruses, but just don't download it
scan your computer allot (not every hour, or everyday, just once a week or something)
And if i was you, don't download AVG, it's a good anti virus, but they once updated their software, everyone downloaded it, allot of computers got broken of that update..