Periodically I find multiple copies of unread emails in Inbox. Also when I attempt to attach *.pdf or *.xlsx files the recipient ends up with  *.dat files which are garbage. Even when I Bcc: emails to myself (same computer) I get multiple copies.  I capture three (3) email addresses and have for almost three years with no problems until approx. two months ago. It has gotten progressively worse since upgrading to WIN-10.   I sure could use some help / suggestions.   //  Dean