Help with my games don't work properly hellppppppp ARG?

i need help with my games they either say program closing or the screen goes black and then minimizes then i click on it, it does the same again the games i have tried which said program closing are need for speed shift demo and fallout3 and the ones we're the screens go black are fight box and this taxi game NEED help ASAP this is about my system http://support.packardbell.com/uk/item/?sn=105580490385&g=1400 check it