How does Windows 10 delete user profile registry entries completely?

Windows 10 gets rid of user profile registry entries by deleting the profile's SID from the registry. To do that, open Regedit and go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList. Every SID is a user profile. Find the right one by using the ProfileImagePath, then delete that SID key. Next, get rid of the corresponding folder from C:\Users to prevent leftover files. Reboot your machine so that Windows updates the profile information. This way, Windows 10 will delete user profile registry entries thoroughly, and the account will not reappear in the system settings. Read more: https://datarecovee.com/how-to-delete-user-profile-in-windows-10/