It has been a big deficiency of Windows that the standard file viewer has a quite arcane, difficult to use and restrictive viewer of Metadata including EXIF information in a file.
After eventually coming out with a raw viewer some months ago, a color profile manager a few months ago too, they have finally release the Microsoft Photo Info Tool to allow viewing, editing, add, change and delete from an easy to use tool that integrates with Explorer - and it works in Windows XP and Visa.
Windows users can download it for free from: here.