Windows 11 PCs automatically upload update files by default, sharing them with other devices on the internet unless users change a specific setting

How Delivery Optimization Uses Your Bandwidth

This feature, part of Microsoft’s delivery optimization system, allows your computer to send and receive Windows updates from other machines to speed up downloads. However, many users are unaware their upload bandwidth is being used to help strangers download updates, potentially slowing their own connection or increasing data usage on metered networks. The setting controlling this behavior is buried in Windows Update advanced options, where delivery optimization can be adjusted or disabled entirely.

When enabled, Windows 11 uses peer-to-peer technology to distribute update files, meaning your PC may upload parts of updates it has already downloaded to other computers seeking the same files. This reduces strain on Microsoft’s servers and can improve download speeds for others, but it operates silently in the background. Users on limited data plans or slower connections may notice unexpected upload traffic, especially during peak update cycles. Microsoft states the system is designed to be efficient and respectful of network conditions, but transparency remains a concern for privacy-conscious individuals.

Can You Stop Your PC From Sharing Updates?

Yes, users can prevent their Windows 11 PC from uploading update files by turning off delivery optimization or restricting it to local network devices only. To do this, go to Settings > Windows Update > Advanced options > Delivery optimization and toggle off „Allow downloads from other PCs.” Alternatively, selecting „PCs on my local network” limits sharing to devices within your home or office. Disabling the feature means updates will come solely from Microsoft’s servers, which may slow download speeds but eliminates any unintended upload activity.

Does turning off delivery optimization affect how quickly I receive updates? It may slightly slow down download speeds since your PC won’t benefit from peer-to-peer sources, but updates will still arrive reliably from Microsoft’s servers.

Frequently Asked Questions

Will disabling this setting save data on a metered connection? Yes, turning off delivery optimization prevents your PC from uploading update data, which can help conserve bandwidth on limited or metered internet plans.

Is my personal data at risk when sharing update files? No, the files shared are only Windows update components and do not include personal files, documents, or user data.