Question about Outlook Express

After re-installing IE8, reinstalling Windows Live Mail and most recently allowing security program to check incoming mail, I now have each incoming e-mail arriving multiple times.  Never had this problem before.  I see others have but I fail to see an answer.  I am on Windows Vista.

After re-installing IE8, reinstalling Windows Live Mail and most recently allowing security program to check incoming mail, I now have each incoming e-mail arriving multiple times.  Never had this problem before.  I see others have but I fail to see an answer.  I am on Windows Vista.