It only goes as low as 800x600 so i changed the setting to that and changed the colour depth to 16mb (medium) which is the lowest it will go. Still having the same problem. I think it must be a problem with my graphics card but i have no idea what
Edit: I did manage to set it as low as 640 with 256 colours but the monitor just went into standby mode and wouldent even stay on, with the other modes it stays on but the screen is black.