Zoomed In Screen

The game must have used a different screen resolution and should have terminated improperly i.e before turning the screen resolution to its previous state... right click on the desktop and in properties adjust the screen resolution....

If it's what I think it is, it's a very common occurrence. Don't worry about it, first of all.

All you need to do is right-click on your desktop and go to your display settings. Then change the pixels x pixels to a higher setting. Then click apply. Accept those settings and it should be better.

To explain, when you play a game, it is shown in a certain resolution. But the game changes your computer's resolution so that the game will display correctly. Sometimes, it doesn't change back. It's not a bad thing, but it IS a little inconvenient.

If this does not work, let me know!