Heh, you should have seen some of the computers of ex roomates I have worked on....  You know what you get when you have a college roomate... who knows nothing about computers, but loves his pr0n? You get a roomate who wants to know why he keeps getting adds popping up, why his computer is sssssooooo slow.... and wants to know if you can help him find his fuzzies.  At that point.. you wipe the hard drive and do 10 hail Maries.  Heh... well mabey not the hails... but you definately wipe the hard drive.  Same thing I would suggest on any computers where you find a ton of viruses.  Backup needed documents, and check those with a couple scanners, then wipe the hard drive.  Once a computer gets 'dirty'... you more likely than not have root kits and other crap you dont' want to work to find oozing around under the hood.  I think my record is over 400 viruses and pieces of adware/malware floating around on a box I was working on.  (total from combined scans of different antivirus programs that took... hours to run) 

Ditto.  I've hit in the 80-90 range before, but most of the copies were not functional.  There are several virus/malware strains now that will create copies of themselves when they log a certain event (opening up explorer, anti-virus loads into memory, mercury enters a retro-grade orbit into Jupiter's third house, etc) and you find them renamed and copied all over the place.

Shoot if you think roommates are bad try a household of Teenagers (4).  Even with AV. anti-spyware, etc I reformat their machines almost quarterly.  Needless to say they are a completely separate network with an independent firewall from all I do.  They would be the complete opposite of a "Trusted Network".  LOL

-Jack

LOL your an evil man g00d_4sh.