I am running Windows Live Mail with Windows 8.1.  I have made no recent changes to my email setup.  (Though there are those infuriating automatic updates which reliably break something.)  Beginning a week ago, emails to my IMAP account could not be seen in my Live Mail inbox.  The number of unread emails indicates that I have received a new message, but when I click on the inbox, the last message displayed is five days old.  (I can see the new messages on my phone.)  I have tried searching the inbox for the missing messages and they are not found.

My work requires me to save my emails, so I cannot do anything (like uninstalling) that might delete them.  (The last time I tried to export to backup, it did not work and I lost all of my emails.  I am not willing to rely on that again.)

I have already "repaired" Windows Essentials.  It did not work.