Windows 10 Insider Preview Build 18353(19H1) 

Hello Windows Insiders, today we are releasing Windows 10 Insider Preview Build 18353 (19H1) to Windows Insiders in the Fast ring. If you are looking for a complete look at what build is in which Insider ring – head on over to Flight Hub. You can also check out the rest of our documentation here […]

情報源: Announcing Windows 10 Insider Preview Build 18353 | Windows Experience Blog

First Ring向け19H1の新ビルド。細かい改良とバグ修正のみ。