Windows 10

An update on our Unified Update Platform (UUP) - Windows Experience Blog

As a recap, one of the biggest benefits UUP brings to our customers is a reduction in download size of build updates on PCs. We’ve converged technologies in our build and publishing systems to enable differential downloads for both PC and Mobile.
A differential download package contains only the changes that have been made since the last time you updated your device, rather than a full build. Differential download packages rely on re-using files on your current OS to reconstruct the newer OS. This could include copying files as-is that have not changed between builds, or it could involve applying “binary deltas” or “diffs” to old files to generate newer files. Differential download packages are smaller and can take a shorter amount of time to download.
 
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