You mean all those nasty worms, viruses, spyware, trojan hourses and other misc crap you get when just simply using your system? I had just recently removed a spyware worm (great now the little bastards are combining them) that I had contracted because I had my Anti-Virus agent down one day while there was a problem.

These days you need a network security program, anti-virus software, email scanner, spam/junk mail blocker and some kind of browser security system (popup blocker, etc) to be able to just use your system while online without eating the big chunk of poo.

The Windows world is pretty nasty sometimes and gradually becoming more and more so.