A couple of days ago several of the pc's in our office suddenly lost their ability to open PDF files from Windows Live Mail. 

The pc's open pdf's just fine anywhere else but through the mail application.  I've tried repairing and reinstalling both Windows Live Mail 2011 and 2012 and they both have the exact same problem. 

I've also tried removing and reinstalling Adobe Reader, and I also tried to use another pdf program, Fox It Reader and that didn't work either.

I also tried to change the user to an administrator just in case being a standard user was causing the issue, that didnt work either.

I am so frustrated and am at a loss.

Is it perhaps a Windows update that may have caused this to stop working?  It's unacceptable, a person has GOT to be able to open a pdf for crying out loud.

Someone mentioned something about missing dll's on another post about a year ago, I was wondering if anyone else has seen this and if they were able to fix it?  Was it the cause?