Microsoft has released new, optional non-security preview updates, also known as "C" releases, for all supported Windows 10 versions. The updates fix several annoying bugs in games and applications.
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Today, Windows Insiders on Windows 10 21H2 were treated to an update in the Release Preview Channel that contained one fix, but it also includes all of the fixes from last weeks optional update.
Today, Windows Insiders on Windows 10 21H2 were treated to an update in the Release Preview Channel that also contained a bunch of fixes for app crashes. There's no known issues reported.