[1]

May 9, 2017—KB4016871 (OS Build 15063.296 and 15063.297) - Windows Help ( (2017-05-10 20:08:42 +09:00)) https://support.microsoft.com/ja-jp/help/4016871/windows-10-update-kb4016871

Addressed an issue where Microsoft Edge users in networking environments that do not fully support the TCP Fast Open standard may have problems connecting to some websites. Users can re-enable TCP Fast Open in about:flags.

[2] Windows 10 Creators Update (Build 1703) > Microsoft Edge で Google サイトにアクセスできない > パッチが公開された - Qiita ( (2017-05-10 20:09:49 +09:00)) http://qiita.com/7of9/items/73ff7c09fe2c2a2ec10a