Hi John,
welcome aboard

How are things in The Netherlands?
I once helped a friend who could not import messages in Vista.
What I did was create a folder on the desktop called inboxold I opened Outlook. Selected all the messages he wanted to carry over. I then Dragged and Dropped the emails into the folder inboxold.
I then put these on a USB key and did the reverse when putting them into Windows Mail.
I hope you can understand this explanation.
Let us know how you get on,
regards
Steve