Place your mouse in any blank spot on your desktop and Right-Click. In the pop-up window select "Properties" Along the top you will see tabs, left-click on "Settings" It will show you the present settings. Place your mouse to the left of the current setting and it should move to a higher setting continue this until you get the setting you want. If is doesn't change you will have to install a different video card that supports a higher resolution. Hope this helps
Bruce
June 2008