From The Next Web:
Windows 10 launched on July 29 to much fanfare — it’s a free upgrade for Windows 7, 8 and 8.1 users — but along with the privacy issues, there’s another small thing you should check: by default, Windows 10 uses your internet connection to share updates with others across the internet.
The feature, called Windows Update Delivery Optimization is designed to help users get updates faster and is enabled by default in Windows 10 Home and Pro editions. Windows 10 Enterprise and Education have the feature enabled, but only for the local network.
‘You can disable WUDO, but the option is buried in the settings menu for Windows Update under ‘advanced options’
It’s basically how torrents work: your computer is used as part of a peer to peer network to deliver updates faster to others. It’s a great idea, unless your connection is restricted.
You can disable WUDO, but the option is buried in the settings menu for Windows Update under ‘advanced options’ then ‘choose how updates are received.’
Microsoft says that delivery optimization will not download or send personal content and only sends “parts” of the update cache but enabling it by default isn’t fair for users who might be on internet connections with limited bandwidth. I’ve asked Microsoft for details on how much data is sent when it’s enabled.