Microsoft has released the first Windows 10 SDK as part of the 20H1 development cycle, and the first since the release of the final SDK for version 1903. As such, this one actually has new changes.
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windows 11 insider preview
Build 18890 RSS
Microsoft today released Windows 10 Insider Preview build 18890 to the Fast ring, although there are no major new front-facing features. It only contains a list of fixes and improvements.