Do what Garrett said. If it still doesnt work, reinstall DirectX and VC 2010 ( C++ ) ( http://www.microsoft.com/fr-be/download/details.aspx?id=5555 for 32 bits ) ( http://www.microsoft.com/fr-be/download/details.aspx?id=14632 for 64 bits ) and http://www.microsoft.com/fr-be/download/details.aspx?id=35