The computer must be restarted before updating
The order of installation has never seemed important but let me know if you discover otherwise.
Press a key or wait a few seconds to continue starting up." After a moment, the computer continues starting up.In the Windows 10 Technical Preview, Windows Update still downloads and installs updates automatically.And if you have Windows Update set to "automatic," it will work like it does in previous versions of Windows: it will wait until your computer is idling (this usually happens when you're in the middle of a major, unsaved project and you've just stepped away from your desk for an impromptu meeting with your boss), and it will restart automatically.If you need help with this process, consider bringing your Mac to a Genius at an Apple Store or an Apple Authorized Service Provider for help.If you plan to visit an Apple Retail store, you can make a reservation (available in some countries only).
See the Additional Information section of this article for guidance.