To prevent users from changing file associations using the File Types tab in Folder Options, merge the following in the registry:
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoFileAssociate"=dword:00000001
Delete the key to allow changing the associations.
Paste the following in notepad and save it with the .reg extension:
Windows Registry Editor Version 5.00
[-HKEY_CLASSES_ROOT\CLSID\{EF8AD2D1-AE36-11D1-B2D2-006097DF8C11}] [-HKEY_CLASSES_ROOT\CLSID\{B091E540-83E3-11CF-A713-0020AFD79762}] [HKEY_CLASSES_ROOT\CLSID\{EF8AD2D1-AE36-11D1-B2D2-006097DF8C11}] @="Global Folder Settings" [HKEY_CLASSES_ROOT\CLSID\{EF8AD2D1-AE36-11D1-B2D2-006097DF8C11}\InProcServer32] @=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\ 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,62,00,72,00,\ 6f,00,77,00,73,00,65,00,75,00,69,00,2e,00,64,00,6c,00,6c,00,00,00 "ThreadingModel"="Both" [HKEY_CLASSES_ROOT\CLSID\{B091E540-83E3-11CF-A713-0020AFD79762}] @="File Types Page" [HKEY_CLASSES_ROOT\CLSID\{B091E540-83E3-11CF-A713-0020AFD79762}\InProcServer32] @=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\ 00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,53,00,48,00,\ 45,00,4c,00,4c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,00,00 "ThreadingModel"="Apartment"
Now merge it with the registry.
To remove access to the Folder Options in explorer import the following into the registry:
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Group Policy Objects\{BE399983-1586-4348-BDDA-08DCCADB3A6B}User\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoFolderOptions"=dword:00000001
Log Off to apply the settings. To restore the folder options Change the dword value to 00000000
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