The download goes to 644,xxx.yy and then return to 642.xxx.yy.
Are the quoted "644,xxx.yy" and "642.xxx.yy" referring to the updated version? WSUS will download all relevant update metadata about the products and classification you have selected during the process of syncing with Microsoft Update,
which includes different CPU architectures and versions.
If these numbers represent other meanings, please elaborate on the source.
Regards,
Yic
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