I'm running Windows 7 - Windows Live Mail started giving me the message "A problem occurred while trying to open this message." any time I try to open a message (including old ones). I've unistalled all of Windows Live Essentials which includes Windows Live Mail. I also cleared the registry entries for these and then rebooted and reinstalled All of Windows live Essentials. I imported the email I exported before I unistalled Windows Live Email. I get the same message when I try to open any email, old or new.