Unfortunately I've tried all of the above, as far as the compatibility settings and such.

Have you gotten the newest Windows 10 update that came out yesterday? I think they're calling it the Windows 10 Anniversary Update. That is the one that I'm referring to

 

Currently using Poser Pro 2012 (Display Units = feet)

AMD Phenom II 3.2ghz (6 cores)

8gb RAM

Windows 10 Pro 64bit