Login as user
Run RegEdit from command
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\W indows NT\CurrentVersion\ProfileList
Expand list, find two identical profiles, but one has .bak
The .bak is the old profile. To bring it back, rename the new one by adding extension “_new” to end of profile name, then remove the “.bak” from the old profile.
Restart, and log back in.