Angels have the Phone Box
Correct me if I'm wrong, but you are referring to saving usernames and passwords in the web browser, right? What browser are you using?
You could try resetting the browser to see if that makes a difference.
Reset Internet Explorer
Personally, I wouldn't save logins in the browser - too dangerous. A password manager (like LastPass) is a much better alternative. Unfortunately, Edge does not have extension support yet, but you could use one in Internet Explorer, or any other 3rd-party browser like Firefox, Chrome or Maxthon.
Hope that helps!