i upgraded from winXP pro running at 1024-768 to windows 7 Ultimate. now when i start it does POST then screen goes black then blue box saying out of range H.35Khz V.86.6Hz. when it finally gets to windows desktop it runs at 800 - 600 unable to change
Try downloading/installing the latest video driver from the video card manufacturer's website. (If a Win7 driver isn't available, use the one for Vista.)