Microsoft seems to make a major change in Windows 10 to the way it delivers updates for the software. The leaked version of Windows 10 build 10036 (the current version is build 9926) allows you to grab OS updates from Microsoft as well as other computers, whether they’re on your local network or on the Internet. P2P technology is usually associated with file sharing services like BitTorrent to download illicit copies of movies and albums, and of course, those endless Linux ISOs you’ve been downloading.
Source: https://thehackernews.com/2015/03/microsoft-windows-10.html