Unless you have a very, very old monitor, 1024x768 should not be your maximum resolution. Odds are the problem is that you don't have the proper video drivers installed, and Windows is using a generic video driver, which tends not to allow for anything beyond lower resolutions. Download and install the Windows 7 drivers for your card, that should allow you to access higher resolutions. If that doesn't work, check with your monitor manufacturer for Windows 7 drivers for your display, sometimes the generic monitor driver that Windows provides won't work properly, and won't allow you to use higher resolutions.