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A common problem on Windows 7 is the GPU Scaling options being locked which would make older games stretched in widescreen or shrunk to fit original size. There are many various fixes such as those from AMD or third party fixes or custom programs.
Some causes or symptoms of the issue can be described as listed in AMD's support page.
AMD's official fix is to choose a lower desktop resolution, set the scaling option, then restore the native desktop resolution.
Using AgentGOD's program allows you to set GPU scaling options using his third party program. You can view a forum post on Guru3D about the fix as well as the update log for the program.
If some DirectX 10 or DirectX 11 games are underscanned and have a black border around the screen (mostly on HDMI displays) in games like Crysis, Crysis 2, and L.A. Noire, despite the fact that you have set your scaling to zero, this guide should help.
Now, before you launch the game, there's one other fix you have to apply, and this is done on each individual game executable file.
there are PLENTY of possible causes and solutions for this problem.
Uninstall just CCC selectively (using Catalyst Install Manager), and then:
AMD's official website where you can find support and download drivers.