Another issue with the Windows 10 upgrades is that they require quite a bit of time, but fortunately, Microsoft is making some changing to streamline the process. The current Insider Previews for the Fall Creators Update feature some changes that shorten the "offline phase" of the upgrading, which means you'll lose less productive time.
Here is the old way of processing Windows 10 Updates:Via: Hot Hardware
Online phase:
PC checks for upgrades (manually or automatically) Upgrade payload downloads PC waits for the required reboot to begin install
Offline phase:
PC reboots to begin install process (manually or automatically) User content (apps/settings/configurations) is backed up New OS files are laid down (Windows Image [WIM] process) Drivers and other required OS files are migrated User content is restored PC reboots and the update finalizes
And here is the new and improved way of doing things according to [Microsoft's Jason] Howard:
Online phase:PC checks for updates (manually or automatically) Update downloads User content (apps/settings/configurations) is backed up New OS files are laid down (WIM process) PC waits for the required reboot to begin install
Offline phase:
PC reboots to begin install process (manually or automatically) Drivers and other required OS files are migrated User content is restored PC reboots and the update finalizes