OK, I have tested W8.1 installed from DVD into a Legacy BIOS mode environment (inside VMWare Workstation 10). I do find the Fast Start power options that I describe in my how-to, and I am able to adjust them properly.
Can you check your installation again? If you still don’t find it, can you provide a dump of that picture (<Alt>+PrtSc will take a snapshot of the active window, allowing you to paste it into documents etc). If you are not allowed to paste it into the forum directly, you can use SusePaste.
dayfinger