can anyone help.please.? i got a tower from someone as my mines is windows me and very slow.i got windows XP and for a few days it was ok.then it just wouldnt do anything.ihave lights on on the tower and the monitor switch goes green then clicks off and i am left with a black screen.my monitor is fine because i hooked it back up onto my windows me tower.

What is the make and model of the computer?

Were you given a system CD with it?