system resources

I have a a7v333 mother board w/radeon 7000 ve video card, sound blaster live 5.1 sound card, 512 corsair ddr 2100 and a maxtor 40gb hard drive. Oh, and i am running windows 2000. I am having a problem with the computer running very slow. If i puta cd rom in and try to install something. everything slows down. the mouse pointer moves very slowly. the resource manager peaks out at 100% and stays there. HELP.