When we install the updates on Windows it is always a slow process. That's slightly longer than it takes to watch Army of Darkness.
Cutting the offline phase by 63 percent compared to the Creators Update wasn't achieved for free. This has resulted in an overall reduction of offline time when installing builds in the Insiders Program to an average of 30 minutes.
There have been three major updates to this point-Anniversary Update, Creators Update, and Fall Creators Update.
Microsoft's update policy was called into question recently, when a number of Windows 10 users who had chosen to defer the Windows 10 Fall Creators Update (FCU) for a year were forcibly upgraded from earlier versions, despite the FCU only being released about half a year ago. When the online installation completed, the offline installation starts which makes the computer unusable when the offline updates are going on. Online phases occur while the device is being used and the OS is up and running, while offline phases are, well, offline.
The other competitors of Windows like Linux can handle big updates without rebooting and they don't lock the system like Windows does during the updates. Online phases happen while you continue to use the PC, where as offline phases take full control forcing the user to wait while they finish. However, it's nice to see that the install time has been cut almost two-thirds compared to the original Creators Update, and is down from 51 minutes (on average) for the Fall Creators Update.
These changes will also result in the online process taking longer but Conway said it won't be noticeable "to most users", since the process will run at low priority, without having any significant impact on battery life or system performance. Microsoft plans to extend this to cover your interests, family, accounts, and more in future updates. In fact, Microsoft has been under fire for forcing updates on users and even taking over their machines to apply updates.
The Spring Creators Update is expected to release next month.