"That's the only part about building computers that I absolutely hate, not knowing what of those core parts is fubar'd without having to go out and buy and replace parts at random. And that doesn't help when I'm building it at 1 AM." No kidding.
Just got 2 new machines at work. We found both have a hardware conflict between the DVD drive and the network card. Had to install one piece of software with the network cable unplugged. It didn't help that I then had to re-install that program twice as the updating component got stuck.