Up until a couple of days ago my windows live mail was working fine, then all of a sudden when receiving mail it is just stuck .....I have left it running for hours and its not completing and not giving me an error message either!  Nothing has been changed at all on my system. I have been going to task manager and ending task on live mail then shutting down and restarting which has worked in the past when this happened once before but it is not working at all.  I am having to use BT Yahoo mail in the meantime, which is a pain but that is receiving and sending e-mails with no issue!!!

How can I sort/clear windows live mail to get it working properly again?