Windows Registry Files and Where to Find Them
http://www.easydesksoftware.com/regfiles.htm
In Windows XP, 2000, and 2003 there are several Registry files. These files are named without a file extension and are stored in the Windows\System32\Config folder. These files are named Software, System, SAM, Security, Default, and UserDiff. There is one more Registry file and it does have a file extension, NTuser.dat. In Windows XP, 2000 and 2003. NTuser.dat is stored in the users folder under the Documents and Settings folder. Each user has their own NTuser.dat file. The NTuser.dat file stores all settings that each user selects; these settings will override settings stored in the System file.
LAST UPDATED: 02 February 2018 (Bluetooth File Transfer)