http://www.itmedia.co.jp/pcuser/articles/1809/27/news082.html
おっと
Announcing Windows 10 Insider Preview Build 17763
UPDATE 9/20: We have released Windows 10 Insider Preview Build 17763 to Windows Insiders in the Slow ring.
Release Preview はまだ
Release Preview 後 1週間の余裕はあるだろうからぎりぎりで迎撃準備