hi! I bought a new laptop Acer Aspire 5742G! There are two graphic cards in it - first is Intel HD maybe integrated, second NVidia harder than the first! The problem is that I cant use NVidia card! I can`t change which card to use! Into bios is impossible (there is no such option)! Operation system is Windows 7 Ultimate 32bits! How to solve this problem? Thanks in advance!