Exif consists of multiple sections, the standard part (ISO, shutter speed, aperture, etc), and a part called Manufacturers Data, which has a lot of the good stuff. Nikon changes this part from time to time, which leaves old unmodified Exif tools worthless (for that part). Also if we use an Adobe program to re-save the image, Adobe strips out this Manufacturers part.
The best Exif tool (it is the ultimate because it is very actively maintained for new cameras) is Exiftool
ExifTool by Phil Harvey
This is a Command Line program, not a Windows GUI program.
However, towards the bottom of that link above, at WINDOWS UTILITIES, is ExifTool GUI For Windows,
ExifToolGUI
Putting it in the same folder as Exiftool (renamed to be without the (-k), and then running it, makes an excellent Windows GUI applicationfor Exif data.