If your processor cannot deal with W10, it would just not upgrade to it, so I don't think that is the problem.
Maybe you can update the |FTDI driver to version 12216. That one works great on my laptop with the latest W10 anniversery version 1607 update.
When I updated to this anniversery version, I had to reinstall some drivers, because windows filed them in another place I think.
Mount: DDM85 Standard 12V ; Telescopes: TEC140 + 140FF + Quad TCC ; Celestron RASA; TMB 92SS + 27TVPH Cameras: ZWO ASI 174MM cool; SBIG STF8300M; ATIK4120EX; TRIUS SX-36
Filters: Astronomik and Baader NB + RGB; Lunt double stack 75 mm unobstructed signature series + BF 3400; Dutch weather and light polluted skies.