White Shark

Hello Friends I Am Suffering A Problem By GTAVC When I Am Opening GTAVC Then I Am Getting This Type Of Error : Grand Theft Auto VC Cannot Find Enough Available Video Memory. Please Help Me Yesterday I Was Able To Play GTAVC But After Installing Windows 7 Home Premium I Am Not Able To Play GTA :'( And I Am Not Able To Install My Graphic Card Also In Windows 7 I Have UniChrome Pro IGP (P4M800 CE/Pro) Graphic Card Please Help Me :'(