Windows 7 diplay of screens in facebook games

I had this prob with my new laptop that is a Dell with Vista but resolved it and cannot remember how to do it. A friend has same prob with Dell laptop with Windows 7, need help please. I play Facebook games,
Farmville, Cafe World and the window where the game shows to play is out of kilter. It is not centered, has white borders and everything does not fit. I did all the normal things on mine but cannot remember how I fixed it. I am not sure where I found it but there was a sub category called specialization that I used. Cannot find it again can you please help me. This is for an elderly man in his 70's who has just had cancer surgery and cannot play games while recooperatong...PLEASE..PLEASE HELP ME WITH THIS.

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