The way to read this diagram is to see it as three columns (though all the upgrade and update elements are shared, except at the bottom). Microsoftįigure 1: The UUP architecture diagram, in three columns. The architecture diagram from that article helps put its pieces and parts into perspective, as shown in Figure 1. It describes how UUP works to enable Windows clients to find, download, install, or roll back Windows updates. “ Get started with Windows Update” in particular is a terrific source. Microsoft Learn offers plenty of documentation about UUP. Instead of downloading the same monolithic download file to every device, it downloads only those files for the target system for which updates are available. To accomplish this, Windows Update scans your PC’s component store and packages up only those update files that need to be applied to your system. (UUP does many, many small downloads as it runs.)
Thus, UUP is best understood as a technique designed to limit the size of individual downloads. The impetus for UUP came from user feedback about how Windows Update would benefit from reducing consumption of local processing resources to improve battery life, and for download sizes to be smaller to complete more quickly and consume less bandwidth.
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