Hi
I could get better time response in Win 8 (according to my upper post comparing Win 8 with 7).
My CPU load was near 30% as I wrote before , and now it’s beetwen 5 and 10%, much better 
To reach this, I modified in Windows configuration my power profile setting all at maximum, which was not done, (shame on me) and disabled in the bios the C-state on processor option.