did you make sure to (re)select low settings, and apply them? Most likely it will continue to work after a reboot into 'normal' mode.
Alternatively, you can remove your display drivers so windows boots up in standard VGA again (640x480x16 colors), and re-install the video drivers... But that's a bit messy, of course.
Alternatively, you can remove your display drivers so windows boots up in standard VGA again (640x480x16 colors), and re-install the video drivers... But that's a bit messy, of course.