This was a very informative post over on the active Adobe InDesign Forum for Windows users titled, “Can’t open INDD files from Bridge or Windows Explorer.” This is similar to our report on the Macintosh side where certain InDesign files would not open, but a different sort of nasty little file association issue. User henweg reports:

Now, neither Bridge nor Windows Explorer recognizes InDesign files. I can still launch the program from the Start menu and Desktop shortcut, and I can open files from within the program. But Bridge says the default  for opening an INDD file is Acrobat…or Photoshop, Firefox or IE. Windows says the same. The INDD icon is no longer displayed in Windows Explorer either. It seems to have vanished from my system. I have tried to re-associate InDesign files with the program through Windows Explorer numerous times to no avail. Operating System: Windows XP Professional on a Dell GX270.

Is the only solution here to uninstall & reinstall InDesign? Any comments or suggestions are appreciated.
Source: http://forums.adobe.com/message/2283103

A few others reported the same thing with failed attempts to fix it. Until just recently we see this post, with a solution to the association problem they had and perhaps you are facing today. User dragonflynz answers:  Read more... (376 words, estimated 1:30 mins reading time)