Unstalled Norton. Getting Security Vault logo on many other apps.

I had installed Norton 360 Online via Earthlink.  A few months ago, I was getting the BIG Norton Security Vault Logo on many other apps interfering with sending and receiving messages.  I uninstalled Norton for this reason and installed Trend Micro.  I am still getting the Norton logo (circles nested - open at bottom) on my other apps and can't get rid of it .

Please see screen shot attached.

I use Firefox browser.

Any suggestions would be very much appreciated.

Joe Chernow, CPA