What graphics card are you using?

nvidia 9800gt

supported is 1280 x 1024
leave it at that

and did you update a driver or make any changes recently?

This post was edited by DeadShell on Aug 18 2012 04:30pm

Exactly. Reinstall drivers and see if it's fixed

Ive always used 1680 x 1050 with no problem.
And I reinstalled drivers and it fixed, but after I turn off the computer and get back on again, its back to old resolution