Emilio2000 posted on 6/8/2009 and this tip corrected the Window Mail
attachments not opening problem for me too....
Another person, named Silverhawk, came up with the correct solution (in a
different thread). It appears that an automatic update of Windows Mail
caused the link used to open Windows Mail to not work properly. Delete the
link, and then create a new one from the basic program in the Start "All
Programs" menu. Here's how Silverhawk describes it:
I noticed that if I start windows mail from
the IE8 browser, then it appears to work ok. But if I start windows mail from
the start menu, that is when I have problems. With that all said. I went to
the start menu and removed the shortcut from the start menu, then I went to
the applacation source and started the program from there, and tried it again.
And everything seems to be working fine. I then re-pinned it back into the
start menu.