https://www.bleepingcomputer.com/news/microsoft/missing-files-bugs-reported-after-windows-10-october-2018-update/

Reports are coming in that users are running into many issues after installing the Windows 10 October 2018 update. The biggest problem is that people have found that huge amounts of their documents and other files were deleted after the update was installed.

With the amount of issues that users are currently seeing, it may be wise to defer the installation of this update until Microsoft has had more time to resolve the bugs that users are seeing.  Information on how to do this will be explained at the end of the article.