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Apply the default account picture to all users
GPO PowerShell Regedit CMD
In Registry Editor we can see the following changes:  For Enabled we get:  FullKeyPath : HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer ValueName   : UseDefaultTile Value       : 1 For Disabled we get:  FullKeyPath : HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer ValueName   : UseDefaultTile Value       : 0