You probably have to update the drivers for your video adapter. So maybe you have to get these from your manufacturer's website. Let's say that you have an HP, then visit www.hp.com and look for the Download or Driver section. That should show you a place where you can type in your model number, like Pavilion 510N. From there, you should be able to find your video drivers.
If you have no idea, maybe you should seek a visit from a PRO. You can bring your computer (leave monitor, keyboard and mouse at home) to a place like Staples, who has the Easy Tech services.
Good luck and Happy Computing!Monitor wont allow me to change screen resolution through controlpanel?
you need to find out who made the video card.
and download and install the specific drivers.
you are probably using default windows drivers.
download everest free edition
this will tell you which card you are using
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