My computer has restarted and now I can see that my main monitor is at 720 x 576 resolution setting instead of the usual high-quality 1920 x 1080 display. In the control panel, usually I can choose from the highest (3200 x 1800) to the lowest (1024 x 768 3D), which are the options for my second monitor, but the resolution options are now 720 x 576 to 640 x 480. I'm pretty sure I haven't done anything to my monitor to trigger this, but it happens anyway. Is there a way to make it let me choose 1920 x 1080 again?