How do i get back black bars in my game

[Honest]

Hi guys, i have been playing this game which has black bars on the side for quite a long period of time. So im kind of use to it. But yesterday, i accidentally did something to it. I right click the game.exe and set the compatibiliy mode to xp 3. And this make my game go full screen. So im wondering how can i change it back to the original size which has black bars on it! I have been checking online, but all it tells me is how to get rid of the black bars when i want the black bars back. haha Thanks if you could help me!

 

[theveterans]

Go to your game video settings and then change to "windowed" and change the resolution to 1024 x 768 or 800 x 600 or 640 x 480 or 1200 x 900 or 1440 x 1080 or 1400 x 1050. These resolutions should bring back the black bars on the side of your monitor

 

[Honest]

Oh Thanks for replying! But however, i do not have the "windowed mode settings in my game. I am playing Sudden attack! Yes i tried changing the resolution to 1024x768 but it still didnt bring the black bar !