C:\Documents and Settings\username\Ntuser.dat
C:\Documents and Settings\username\Local Settings\Application
Data\Microsoft\Windows\Usrclass.dat
C:\Documents and Setting \username\Ntuser.dat
This is a registry file kept in the registry and not in your documents. It contains personnel settings for each user. Leave this file alone.
When a user logs onto Windows, the Ntuser.dat files (along with the HKEY_USERS hive) are used to build the HKEY_CURRENT_USER hive for the registry. The Ntuser.dat files hold the preferences and settings of users.One Ntuser.dat for each user on the machine, some templates and repair.C:\Documents and Settings\AdministratorC:\Documents and Settings\Default UserC:\Documents and Settings\LocalServiceC:\Documents and Settings\NetworkServiceC:\Documents and Settings\username\Ntuser.datC:\WINDOWS\repairC:\WINDOWS\SYSTEM32\CONFIG\systemprofi...Hope I helped :)