I want to make a backup of it.
For the favorites.
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The NTUSER.DAT file is in your user folder. In Windows 7 and Windows Vista, user folders are at C:\Users\USER_NAME.
You might not see it in explorer but it' there. It will be locked if you are logged on as the user you are trying to access, so you could use another user with administrative rights to save it.
Read more: What Is the NTUSER.DAT File? | eHow.com http://www.ehow.com/about_6697490_ntuser-dat-file_.html#ixzz2FXnagdQi