Login Keyring Notifications Redundant and/or Annoying

I did put my computer through some slightly unusual stress -- home folder backup to a portable hard drive. Cause and effect? But now I get notification boxes at sign in telling me that I need the password to my modem and boxes then continue with: "The password you use to log in to your computer no longer matches that of your login keyring." I've gone to USERS and changed password and checked administration status. I've done every option I can think of in the wireless settings.