I'm on Windows 10 and I've been using Windows Live Mail 2011 for many years.  Just recently I started having problems with my contacts My overall contact list has remained the same (I think), but the contacts in my distribution lists (categories) keep changing - both dropping many of the contacts I had in those lists and adding contacts I didn't have in the lists. Just today, I stopped being able to send or receive emails.What can I do to correct these problems?