https://support.microsoft.com/en-us/help/4464619/windows-10-update-history
We have paused the rollout of the Windows 10 October 2018 Update
(version 1809) for all users as we investigate isolated reports of
users missing some files after updating.
https://www.reddit.com/r/Windows10/comments/9ltqu2/
https://www.reddit.com/r/Windows10/comments/9l128k/
reddit 有人说他在 insider build 的时候就碰到了档案被砍的问题了,
那都是两个月前的事了