Vista - Windows Mail Stops Responding

When I start my system up and run Windows Mail it retrieves my email ok
but while I'm deleting some or all the messages using the keyboard Windows
Mail stops responding and the screen color seems to 'fade'. This seems to
occur
only when I first startup my system and check email for the first time
during
the session. Seen to be ok after that. There were also a couple of instances
when
I select E-mail from the Start Menu Vista Home Premium says something to the
effect that it can't access the device.
Also, I been getting email that has no From or Subject so when I right click
on it
all items in the context menu are disabled. Anyway to get around that?

Any help will be appreciated,
James