Hello. Sorry for not putting more info here. The pc is a few years old now. Its a Time pc, 333, 196kram 4G and 8G hard drives. 32X cd rom drive and a seperate DVD/copier drive. Scanner, printer, Logic 3 Sub woofer sound system, Phillips monitor(new one) additional 4 port USB hub. The mouse is a microsoft intellimouse explorer. The one with no ball but a red light under it.!! Keyboard is Logitech cordless iTouch thingy with cordless mouse that i don't use. Have not recently added anything, this problem has only just cropped up in the last few days. Its getting on my nerves now as you could imagine, its so frustrating. I am seriously tempted to reformat the hard drives now.