How do i fix the video card color? cause it gets messed up when i set the resolution for the screen!?

the view looks weird because as soon as i tried to set the resolution for the video card (screen desktop) it got messed up and now it looks like some persons painting and i don't know how to fix it i mean,everything's gray and green and the windows i have open looks like the classic view of the old computers (windows 2000 or 98')! it's hard to fix this dumb video card! and the computer isn't even mine! it's my friends! cause im letting him borrow mine to use until i fix his video card problem! can anyone help me out? P.S. the screen+video card view on my monitor w./his cpu keeps messing up and becomes all blurry like how you rewind a vhs tape! thats how it always look when i start my computer!|||Hi. Right click on the desktop and select "Properties> Settings>". Try changing the resolution and color to minimums first, then start increasing them (always click on 'Apply, not 'OK') until you get the right settings for that particular monitor. (Clicking 'Apply' will go back to the last settings in 15 seconds if they do not work.)