Usually games work fine on my 22'' LCD screen but after playing Indigo Prophecy my screen has been fucked.
 
When not in game the screen is at 1680 x 1050 but when I try to play games they have 2 black lines around them that were not there before. Some of them I can fix some I cannot. Plants vs Zombies for example is terrible and everything is blury.
 
Help me.

does it persist outside the games?
 
it sounds like they're just running at a resolution lower than your desktop/not in widescreen
 
sadly for older games like indigo prophecy they might not support all resolutions, and games like plants vs zombies might not even have options at all, so you'd have to not run it full screen so it won't be blurry.

" does it persist outside the games?  it sounds like they're just running at a resolution lower than your desktop/not in widescreen  sadly for older games like indigo prophecy they might not support all resolutions, and games like plants vs zombies might not even have options at all, so you'd have to not run it full screen so it won't be blurry. "

Sorry to bump.

Interesting. Maybe your scaling get set to off. Usually it defaults as letting your monitor take care of image scaling, but you can turn it off if you don't want you games looking stretchy.  You can change it for Nvidia by going 
 
right click=>Nvidia control panel=>under display option select Adjust desktop size and position. 
 
Then from there you can choose from a couple of options like use NVIDIA scaling or do not scale (which it might be now).