Although Microsoft has often prepped existing versions of Windows for upcoming updates with behind-the-scenes code, the extent of the notification and "advertising" messages within the .xml file issued on March 27 would be a change from past practices.
Clearly, those messages signal that Microsoft will be aggressive in getting eligible users to upgrade to Windows 10 during the one-year stretch after the OS's official release, especially if the company reclassifies KB3035583 as "Important" at some point down the road. (The .xml file is pegged as "version 1.0," hinting that others are to come.)
"Important" updates are automatically downloaded, processed and installed by Windows Update if the device's user leaves the service in its default state.
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