What you have described could indicate a faulty GPU. I would recommend a system clean up and a fresh installation of Crimson 16.7.3, to see if it resolves the issue.
1. Run the Windows self check tool to check scan and automatically repair any corrupt files found in Windows. There is a guide on how to do it here. What you need to do is run an elevated command prompt (elevated means run it as administrator) and type SFC /SCANNOW. This will generate a statement indicating if errors were found the Operating system and if they were fixable.
3. Update Windows. Install all available critical, recommended and optional updates. Often Netframework and Visual C are included in the recommended or optional updates Windows provides. Windows should always be fully up to date before installing our drivers!
4. Use DDU to sweep the system of AMD drivers in safe mode.
5. Install the latest Crimson 16.7.3 drivers once the above is completed and check to see if the issue is resolved.
1. I did so originally, there were no corrupt files. It is a clean installation of Windows 7.
2. I did so originally, they do not need repairing or reinstalling.
3. Windows is up to date.
4. I did this already. I stated in the original post that I had already done this.
5. This was the driver package I installed originally. I also tried an older package (15.11.1). The problem persisted on both installations.
Those were all the steps I've already taken. What are the next steps? Currently the computer in question is at a computer repair store where they are taking the GPU out to test in another computer and putting a different GPU in my computer to try to isolate the problem if it is a hardware problem. Any additional help would be greatly appreciated.
It sounds like it could be a faulty GPU, i would wait and see what the repair store say.