Vista - WLV 8.5 Stops Responding and Freezes - No Reason Why

Hello,
Been having real problems with WLM over the past few days with Vista. The
problem is that all of a sudden I am typing something and press enter my
whole WLM stops responding and I've got to use the task manager to get rid of
the whole of WLM and put it back on, but it keeps doing it. It can be at
anytime it comes at anytime. I've actully waited for half an hour to see if
it will come back but it wouldn't.
I don't know why it is doing this. I've uninstalled MSN Plus and it keeps
doing it. I've even done a system restore before it used to happen and its
still does.
I just don't know whats wrong with it.

If you can help I really appriciate it.
Sean