I have Windows Live Mail 2012 as part of Windows Essentials 2012. Recently when I try to send and email to a Category I have created I receive the message "This message could not be sent.  Type an email address for one or more recipients in the To, Cc, or Bcc box.  I then go to Programs and repair all Windows Essential Programs.  After the repair the program recognizes my category and sends the email.  This fix lasts for a day or two then I must do it again to get the program to send any categories.  Any suggestions?