I stumbled upon this reg key a few weeks ago. If you want to change the default folder view for all users on the local machine use HKEY_LOCAL_MACHINE. If you want to change it for a single user then use HKEY_CURRENT_USER.

Windows Registry Editor Version 5.00

[-HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\Bags]
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\BagMRU]
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Bags]
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRU]
[HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\Bags\AllFolders\Shell]
“WFlags”=dword:00000000
“Status”=dword:00000000
“Mode”=dword:00000004
“vid”=”{137E7700-3573-11CF-AE69-08002B2E1262}”
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