My computer is running Windows 7 Ultimate operating system with 1 GB RAM and Core2Duo processor. It is a Compaq desktop and having a GT220 installation problem. I am not able to understand why I am not able to do the installation. The older graphic card that I was using worked fine with Windows Vista. After doing an upgradation of the operating system to Windows 7, the graphics of the system seemed to be very bad because of which I am trying to get a new GT220 graphics card into my system. Kindly help me as to why I am not able to install this card.