Hi again
I'm leaning to the idea that the Registry locations for some of the Power Options changed in the Anniversary Update. It's almost like a different operating system ("Windows 10.1").
Can you go into the BIOS/UEFI setup screens again, and look for the option that toggles the Fn key functions? It usually has two settings. Either the F1,F2, F3, etc keys are set to require holding down the Fn key at the same time (to perform the special funcions with volume, brightness, wireless, etc.) -- or -- to NOT require holding down the Fn key to produce the special functions. I'm pretty sure that there is a setting in there somewhere --- I see it a lot on the newer laptops that I repair. I wish I could tell you exactly where it is in your BIOS/UEFI settings, but I couldn't find a guide with the exact location.
Good luck!
[P.S. .... for the S0 state, I'll have to look that up ... if I'm lucky, another tech will answer that one (I'm not the fastest researcher in the world)]