Windows 7 Games on windows 7 new laptop

well i just get a laptop for christmas and i wanted to play some games o test it but...
i tried Halo:CE:and i cant play it
i tried: GTA IV: and cant install becuase the Rockstar Games Social Club not compattible whit win 7
i tried: WarRock: cant because a runtime error pops up when installing
and COD4: i think is too heavy and i have slow internet to download it
so lease tell me wich games i can play in win 7
or if u have any solutions for these games

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