Steve Knopper took a new Dell computer and spent 18 days infecting it with all the malware and viruses he could get his hands on. His account if the whole thing is published at Wired.

"What kind of idiot buys a computer and willingly – even eagerly – exposes it to all the malware and viruses he can? Me. I bought a Dell Dimension B110 ($468! Cheap!) and tried to kill it for more than two weeks. I clicked on every pop-up and downloaded the gnarliest porn, gambling, and hacker files I could find."

And then he returned it to Best Buy on the 18th day. Classic. Read Steve's account here.