Hello again,
http://www.ehow.com/about_6697490_ntuser-dat-file_.html
I have opened Windows Explor. and where is the hidden ribbon
press "Windows-E" to open Windows Explorer and then click "View" on the ribbon bar. Click "Options," and then choose "Change Folder and Search Options." Click the "View" tab in the Folder Options window, select "Show Hidden Files, Folders and Drives" in the Advanced Settings pane and then click "OK."
I have no idea what you are trying to describe.