There is a potential issue with Windows 10 KB4532693 update involving the loss of user data. This security update reverts certain system settings to their defaults and also removed files from the desktop.
For many users, Windows 10 has renamed main user profile folder and files can be restored
While many users are able to restore their files from the temporary
folder, some users who have lost all desktop files are unable to get
around that profile folder.
If you are unable to login to your profile or you do login and all custom icons, settings and desktop backgrounds have disappeared, stop using the computer and get the computer to us, or we can come out to you.
We can login remotely to check if backups are working properly, or install if needed.