Can,t change monitor setting resets by itself every time

>-----Original Message-----
>Cant get my display settings to change no matter how I
>approach it.
>Problem started after kid loaded a game.
>
>Tried dumping all of the games she'd installed.
>No luck.
>
>Tried a few System Restores.....
>No luck.
>This gets it close.........it comes back ok then suddenly
>reverts to the same look.
>Small windows, icons, desk top image & tiny text.
>Anyone had and fixed this problem?
>.
>could be a wallpaper download