Starting last week, I  cannot reply to or forward an existing message or create a new message when answering email from outlook online from my home computer.  This occurs on only one computer and oddly with only one of the windows user logons available on that computer.  From any other win user logon on that computer, I have no such issue.  Thankfully, I can still reply to emails  from my phone and my Surface.

The affected computer runs Win 7.  The issue happens when I am accessing outlook.com from IE.  The computer has been scanned for viruses, malware, etc; none were found. 

I saw an answer to this same question for another person on the outlook community page that said try clearing  your browser's cache. I just finished clearing the browser's cache and the problem has not been fixed.

Please help.