What "libraries" are you talking about?
Some libraries created by another, non-Photoshop application like iPhoto or Lightroom? If so, that is perfectly normal.
Those other applications on purpose hide your originals. You need to export your images out of those applications first before other applications can see them.
Bridge wil show you any file contained in any OS-created folder or directory.
Can you elaborate?
Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers:
In Windows 7, when I use Bridge it can't locate libraries and the pictures there in?
Windows Libraries, or what?
Which version of Bridge?
Windows7 Libraries and Bridge /4.0,,,,,