https://www.techradar.com/news/microsoft-has-fixed-that-file-deleting-bug-in-the-windows-10-october-2018-update > After having to embarrassingly halt the rollout of its big new October 2018 Update for Windows 10 late last week – just days after its original release – Microsoft has today said that it’s squashed the file-deleting bug that was the cause for the pause, and is preparing to redeploy the update pending testing by Windows Insiders. > Under specific conditions, the bug resulted in the deletion of predefined user folders, such as Documents and Pictures, when a feature called Known Folder Redirection (KFR) was also in use. KFR allows users to change the location of those predefined Windows folders – so they can be moved to other drives, for example – but to be affected by the bug, users also needed to have kept the original (old) versions of these predefined files and folders in place.