>I am having the exact same problem. I am moving from a Windows XP
>computer, where I used Outlook Express 6, and I am changing to a new
>Windows Vista Home Premium 64-bit system. I did the Easy Transfer file and
>setting migration tool, and it copied my settings and documents, and emails
>over and seemed to work really well. Windows Mail runs MUCH SLOWER than
>OE6 did. (I have way too many messages in OE6, I should have switched to
>'full' Outlook a long time ago) Windows Mail lists all of my messages, but
>if I click on "Create New Message" I only get a blank box for about 45
>seconds to a minute, then the fields finally list (address, subject,
>message, etc...) and the computer is "busy" while the box is blank, if I
>click on anything, I only get 'Not Responding' and everything freezes until
>the box populates. I am trying to change to Outlook 2007, hoping it will
>perform better. Since this is only a stand alone personal usage computer,
>with no Exchange Server, I was not able to EXPORT from Windows Mail using
>that approach. I went to Outlook 2007 and chose to 'IMPORT from OE 4, 5, 6
>or Windows Mail' and it seems to go through all the proper motions, it
>takes quite some time, and then it finishes with the SUCCESSFUL message,
>and a message count, but in Windows Mail my inbox had 4743 messages, and
>after the import, Outlook has 1001 or 1002. I have tried this several
>times, creating a new PST before each attempt, so as to not have
>duplicates. I have tried to (in WIndows Mail) create a new folder and move
>everything from my INBOX into the folder, then do the import, but then the
>new folder would only immport 1001 or 1002 messages.
>
> I am really in a bind with this. Can anyone help? Or did you ever find a
> solution for your problem?