The Windows 10 update KB4532693 appears to delete user files. Following the release of Windows 4532693 KB10 Cumulative Update, users began to report that their desktop and Start menu returned to the default settings. They also report that they cannot find files stored in their profile.
After research, it was discovered that when installing the update, the user profile was renamed to a temporary profile, while a .000 or .bak extension was added to the regular profile. When the update ended, an error prevented the normal user from being restored.
To resolve the issue, users found that they had to restart Windows a few times or uninstall the update to restore their normal profile.
But problems with this update can be much worse than profiles that do not return after the update.
Comments on WindowsLatest.com, users on Microsoft forums and Twitter reported [1, 2, 3, 4, 5] that their user profile and files are completely missing and that they had to use backups to restore their deleted files.
If the user profile is deleted, it means that all the files stored in the "Documents", "Downloads", "Music", "Pictures" and "Videos" folders are also deleted. Of course any data stored under the user profile is included.
Note that this is not the first time a Windows 10 update has resulted in the deletion of user data.
When it was released Windows 10 October 2018 Update, many users lost their data which led Microsoft to withdraw the update until it fixes it.
What to do if you lack data
If the data is missing after installing the cumulative update KB4532693, first open the C: \ users folder and see if the folders end with the .bak or .000 extensions.
If these folders exist, one of them is probably your initial profile and you can open the folder to check if your data exists.
If your data exists, we recommend backing up to an external drive or cloud service so that you do not lose it.
Then you need to restart Windows 10 a few times to see if your profile is restored. If it does not return, disable update KB4532693.
Click Browse Windows Desktop, type update history, and select View your Update history.
In the Update History window, select Uninstall Updates.
In the "Installed Updates" window, find KB4524244 and click the Uninstall button.
Restart your device.