https://www.techradar.com/news/windows-10-october-2018-update-is-allegedly-deleting-files

It appears that there could be another issue with the October 2018 Update for Windows 10 – alongside the Intel CPU flaw we recently highlighted – and it’s a nasty one, potentially involving the loss of user data.

First off, we should certainly clarify that this is simply based on a number of user reports online, and no concrete conclusions have been drawn yet.