Hardware Graphic Accelerator

Hello,i've been having some problems with my computer. Anytime I run games on my system they do not play, sometimes they just appear black. The very few that do play show a command prompt tellin me-"Hardware acceleration is either disabled or not supported by your video card driver, which would slow game performance. Make sure you have the latest video card driver installed and that hardware acceleration is turned on." Unfortunately my display adapter is up to date(which is Standard VGA Graphics Adapter) which came pre-installed from the vista home premium I installed and again hardware graphics acceleration is turned on. Pls, what do I do? I need a solution desperately.