Snoop

im having a problem...i used to play continuum .38 as Snoop in hockey zone... now that i have installed .40, i cant play anything, not even old .38, i double click and it doesnt load, i get a hourgl!@#$%^&* and nothing else... i have windows XP home edition I dont think i have a video card I cant download any updates from the www.windows.com website ANY HELP WILL BE GREAT I WANNA GO PLAY HALO AND HOCKEY ZONE