problem is fixed with win10 latest updates. From august 2016 or so, no via usb 3.0 dissapear after restart. Same pc etc. ALso, no bluescreen usb3.0 with my wd external 2.5 drives. Win10 is much stable.
on via usb 3.0, i tested via 4.90 setup and also microsoft generic driver, now im on microsoft generic driver, is much stable then v4.90 via.