Messages stuck in out and in box

I'd appreciate so guidance with a windows mail problem if possible.
It seems I have a couple of messages stuck in my outbox also a couple of messages received,with no address,stuck in my inbox.
I asked a Vista mail newsgroup and they told me to download a plug in[WGA from Microsoft] I did that but after opening it extracted 4 files to somewhere I can't find.
Restarting does not cure the faulty stuck messages,at the moment I am clicking on the “Hide read messages” to ignore them but it's not satisfactory.
Thanks if you can help it's getting a bit tiresome.
As a new forum member it may have been covered before but I can't see it.Cheers

Messages may be stuck in the Outbox when you use Windows Mail on a computer that is running Windows Vista

If you use this, you should be able to send and receive mail again. My wish is that you send and receive only good news. Take care.