Save your self a lot of head scraching mo, and get a version win7 64 bit sp1 it will be quicker then win 10 and its tried and tested not like Windows 10, which was never beta tested by microsoft, but by the good company folks whom changed over to win 10 ,thats why it was "Free", and of course its has a higher number much like having a go fast line on your car, its does nothing to help the car but looks good, And now for "Cortana" which can take up to 75 % of system, which has little to do with the running of win10 more to monitor your keyboard and actions on the web and personal data on line and off line. bless the agency's hand in hand with microsoft, I would give windows 10 another year at least before even trying it out, by that time it could be running as good as windows 7 64 bit pro we hope, but that all depends on mircosoft pulling there finger out "pop" and correcting all the failings that are included in Win10, Including "Cortana".