Connection Problems….

well… here goes. first of all i was playing a game then my computer stops responding telling me it has connection problems… now that computer’s internet doesn’t work… but this one does… i am having no problems with this one but that other one is causeing me problems…. the other computer has the router connected over there and cable seems fine…. am not much of explaining things so if u need more info i can supply with it… but anyone ever face this cause i have tried going to connections but it just wont work… i disable and enable and i try repairing but it gives me some msg about the tcp/ip having problems… it runs under win xp… so yeah… any thoughts…?