I recently formatted my computer (OS windows 98) and it now has 16 colors and 640 by 480 pixels. It will not let me change the size and there is no other colors besides 16 colors and 2 colors. My display adapter now is Standard Display Adapter (VGA). I've downloaded and tried the other display adapter on there but they all have the error that the adapter cannot be used. I thought it may have been a problem with the monitor, it is a SONY HMD A200. I've tried solutions from many help pages but none have helped yet. Please help!