I believe it's stored in the Registry under... HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ Explorer\Discardable\PostSetup\Component Categories\ {00021492-0000-0000-C000-000000000046}\Enum Within the Implementing binary value... "Implementing"=hex:1c,00,00,00,01,00,00,00,dc,07,03,00,\ 05,00,02,00,04,00,3b,00,1b,00,98,03,02,\ 00,00,00,21,bf,5c,0e,5f,d1,d0,11,83,01,00,aa,00,5b,43,83,81,\ 45,e0,01,ee,4e,d0,11,bf,e9,00,aa,00,5b,43,83