HAI!!

I just updated my windows ME to windows XP and I have a problem, when I have windows ME I can install games but now I just updated my computer to windows XP and I can't install all games anymore. When I install a game its stop at the middle and it says "installation cannot complete". What happen? I really want to play The Sims 2 and Metal Gear Solid 2 that I got for Christmas.

And thanks! ^_^