Thank you Saurabh A for responding to my "call for help". I did the repair job on windows live mail as described by the excellent instructions provided, but I"m sorry to say that it made no difference. Windows live mail still opens messages too slow. Mind you, once a "first" message has opened, subsequent messages open without hesitation. However, if you then close windows live mail, and check it at some later time, you have to go through the same process all over again.
Btw, yes, I checked all your other suggestions to make sure everything conformed as it should.
Any other ideas?