Hi, I'm not sure what you mean by uninstalling it, then allows the mail to start working but I have found a cure (assuming WM is still installed of course!).
One needs to change a file within WM......the file msoe.dll needs to be changed to another of the same name but it needs to be Version 6.0.6002.18005. (1579kb)
Also in order to ensure that you can opt to arrange that WM is the default mail client, you can run a small registy fix with a file called Windows Mail.reg (33kb)
I have both files if you need them but I'm not sure if I can put them on this