Greetings!!! I've upgrade my OS from W7 Ultimate (x64) to Windows 10 Pro (x64). Everything works good on my PC (except Cortana, that the first day opened my apps, for example Spotify ... and now doesn't open ... she says constantly "what app do you want to open?" but ... ), except Windows Update. When I try to update, give me always the same error: " Update for Windows 10 for x64-based Systems (KB3081704) - Error 0x80070643" I get this update when I go to update windows 10 via windows update but I can't install ... so I can't update the OS. What can I do to solve it? Any option? Thanks for your help!