Hi,
I have just spotted
(on another forum) the answer to this because it's been annoying me for some time too. I could never use Windows Mail and Outlook Express on the same day.
Windows Mail doesn't seem to allow you to save messages like O/E does.
What you do is boot up into
SAFE MODE (press F8 as it starts)
then go to the Bit Defender Directory, find the bdoe.dll file and rename it to
bdoe.dl_Restart your PC and it should work.
It just did for me.
Today I was able to fwd mail from Win/Mail to O/Express with
no problem whatsoever.