try this , i found this fix on many forums where user reported similar issue like yours :>
:>On spinning wheel screen hit CTRL+ALT+DELETE
:>Computer will Restart
:>Press the boot key to start the computer in boot menu
:>Go to boot menu
:>Under boot menu select the option to revert to previous build
:>Trigger the Windows 10 upgrade process once more
OR
:>Shutdown the Computer
:>Then Restart while pressing shift key
:>Wait for the setup (It Fixes the problem automatically)
OR
:>If you have the bootable CD/DVD/USB of Windows 10 Boot it and choose Repair, detect the problem then fix it there This will definitely help you to resolve the problem