I'm trying to convince my parents to buy a new PC for the family. I have CAD stuff I want to to that our PC can't handle. I've already taken out 256MB ram, from 512MB. Our PC is surprisingly clean as far as virii go. I was just wondering if there's some little app that I can download or something I can do that would make the PC run 50% or more slower that is indetectible (i.e. it doesn't show up in the Task Manager or the bottom right of the screen). I was thinking... is it possible to underclock the processor? It's a 867mhz PIII. Any other ideas?