I’m curious—what sorts of “crap” are we talking about? Given that something he downloaded is what’s causing the problem, it’s important to know what he downloaded.
Bare with me - most of the stuff has been uninstalled -
LimeSomething - music download site - uninstalled
Gunz (or something like that) - uninstalled
One other I cannot remember - uninstalled
Stahlhem - no clue what the is - still on the computer
Gamer site named ijji.com - still on the computer.