Hi, I previously had my MacBook Pro (Retina, 15-inch, Mid 2014) bootcamping to Windows 7 but recently upgraded Windows 7 to Windows 10 10162. Now when I boot to Windows it starts to load with the Windows icon and circular dots but then goes to a nearly black screen for about 3 or 4 minutes before the Win10 login screen comes up. Windows 7 previously booted up pretty much instantaneously as does Yosemite 10.10.4 still. I've tried reinstalling the latest bootcamp drivers in Win10 but that made no difference to the boot up problem, though did load a bluetooth driver that was missing before. Any ideas what might be causing the long boot up pause or how to get it booting normally again? Thanks for any help, Phill.