4. Windows 9x/NT 3.5

• Windows 9x/NT 3.5 introduced registry files:

  C:\WINDOWS\
  

  • SYSTEM.DAT -- System settings, protected storage area for all users, and settings for installed programs

  • USER.DAT -- User-specific settings, user profile, Most Recently Used (MRU) file list

  • CLASSES.DAT -- Program associations, context menus, and file types (WinME only)

• A registry backup is created after the system is booted:

  • Win95: SYSTEM.DAO, USER.DAO

  • Win98/ME: RBxxx.CAB