I didn't see if this was mentioned (too much to catch up on in here) But I've noticed Windows these days defaults to Balanced under the power settings, which I thought was only for laptops, but after installed W10 i see its also Desktops. Make sure you're set on High Performance. For me this drastically speeds up any version of Poser. Not just Poser, but any 3D app or video games as well. Its kind of a silly setting since we don't need to worry about laptop battery power management on desktops. I know Windows updates like to try to revert changes you make to your configuration sometimes, so I woundn't be surprised if this also was reverted.

If that isn't it hopefully this at least helps you out in the future.

_____________________________
My most recent Poser animation:
Previs Dummies 2