Starting with Creators Update for Windows 10, there are two ways the update delivery model of Windows 10 has changed. The first, and foremost is the differential update which makes sure download size post creators update will be much smaller. This saves a lot of bandwidth and time. The second feature of Windows 10 Update is updating from an already connected PC which is on Creators Update.This is, in short, the P2P ( Peer to Peer) model of delivery updates, the same technology used by torrents to download and distribute files.
- Go to Available under Settings > Update and Recovery > Advanced Options
- Turn on this feature, and then you can choose if the updates are delivered from PCs on local network or from PCs on the internet as well.
When this is turned on, your PC may also send parts of previously downloaded Windows updates, and apps to PCs on your local network, or PCs on the internet, depending on what you have selected. If your Internet bandwidth is low, you can skip the Internet option.
This is very interesting move from Microsoft as it will speed up update not only IT but also for every home which has multiple Windows 10 PCs. It will save a lot of bandwidth and time, especially when the scope is on the local network.
Not only the Windows Update, but this feature will also let you download apps as well. Imagine if one of your PCs already have an app, your Windows Laptop can straight forward download apps from there instead of connecting to the internet to download.
What this really means is that Windows 10 will make every computer, laptop and tablet a walking store, which can deliver update when needed. Of course, this feature should have an option to opt in and out as it is your bandwidth that will be consumed when an app is downloaded using your PC.
I have experience this personally when testing out the insiders builds, and one of my local PC actually downloaded the update much faster than expected.