Monitor is a 20" LG LCD - I swapped that with a 18" SENIX CRT
I dont know the exact horsepower of the computer (its my best friends Grandmothers computer) but it shows its age with the fact that it has an AGP card in it.
It is running windows XP.
Original video card was a Nvidia RIVA TNT2 and I swapped that with another Nvidia card that work with the same drivers that were already installed.
I tried upgrading the drivers for the video card quickly, and windows say there were no new drivers. I am hesitant to try something from the Nvidia site because of compatibility - sometimes really old cards dont like really new drivers.
Oh, and as for the clean install of windows - I dont know if I can get through a complete install with the monitor staying on. I dont think I could even get started without it going into power save mode.