Windows Live Mail using Windows 7 problems

I just upgraded to Windows 7 and installed Windows Live Mail. I have Internet Explorer 10 as my default browser. The problem I have with Windows Live Mail is that in navigating from one email to the next, the heading of the message changes but the body of the message remains as if the prior email was selected.  This same prior message will stay in the message area even when I click on another email.  The message won't catch up with the email that is selected.  I have asked my computer specialist, and he has gone as far as diagnosing my whole computer's hardware and software.  He has no idea as to why Windows Live Mail does this. Help!