ESET anti-virus. I used to have McAffe but once it cause problems connecting to the internet, and let me tell you, Mcaffe is so ugly to fix that I immidiately uninstalled all of its components and put in another anti-virus. It was like removing an actual virus everywhere, it had its ugly head in everything. Just.... bad software, but it does work. Been having no problems with ESET Security-Center. It catches viruses FAST, scans dowloads as they are being downloaded and cancels them if it detects a threat, and lets you know about it, and scans any file you run, more or less, without spending too many resources. Once I stuck a USB drive from my friend, and before I even opened it up it told me there was a virus on it.
Smart browsing/downloading is also good, With FF and no script I block anything unwanted running from the browser that may be unwanted or bad.
I can also give you the link to some very nasty viruses if you want to get your friend back.
Tag(thx fkusumot) - "Yet again I completely fail to see your point..."
HD vs Wii, PC vs HD: http://www.vgchartz.com/forum/thread.php?id=93374
Why Regenerating Health is a crap game mechanic: http://gamrconnect.vgchartz.com/post.php?id=3986420
gamrReview's broken review scores: http://gamrconnect.vgchartz.com/post.php?id=4170835