Eddie's Blog Search

Tuesday, January 10, 2012

Delete “Account Unknown” Local User Profiles


On Windows XP or Server 2003, under Control Panel / System / Advanced / User Profiles / Settings, there are some “Account Unknown” user profile, but the Delete button is grayed out.  And when try to delete the profile from “c:\documents and settings” folder, the error message is “Cannot delete NTUSER.DAT: It is being used by another person or program. Close any programs that might be using the file and try again.”


  1. Install “User Profile Hive Cleanup Service” (http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=6676)
  2. Run uphclean.exe
  3. Then the “Delete” button becomes available

Note: the User Profile Deletion Utility (delprof.exe) (http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=5405) cannot delete the “Account Unknown” profile, but it is useful to clean up the normal user profile when their account is still active. (delprof.exe /p /c:\\servername)

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