AMD Catalyst Control Center
A common problem for AMD VISION Engine Control Center (ATI Catalyst Control Center) installed 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.
Cause
Some causes or symptoms of the issue can be described as listed in AMD's support page.
- Display's native resolution is currently being used.
- Digital connection between the graphics card and display not being used.
Fixes
AMD's Official Fix
AMD's official fix is outdated and uses ATI Catalyst Control Center in the instructions and images. You can view the support page on AMD's support website. This fix basically requires you to change your resolution to a non-native type such as a low resolution, which unlocks GPU scaling options, selecting and tweaking scaling options, and then restoring your display to its native resolution.
ATI GPU Scaling Fix Program
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.