I'm the type of person who goes over to my friends and fix their computer with like 400 infected files plus a shitload of spyware. The next week they have it all back again.
I don't have any viruses or spyware. I (used) to run my own radiostation (www.radioactivefm.com server 2, down until further notice). I ran a few game servers, I ran/run my own chat boards (many in the past and the one at radioactivefm.com). I built my computer from my dads 'old' parts. When you look at my system you can only imagine what he's got. My dad has a bunch of sertifications like MCSE, A++, CNA etc. He owns/co-owns 3 computer companies.
Hope I answered your question
Oh, and I make Unreal and UT Mods in my sleep XD