When I am trying to read or open my Emails, I am constantly getting this message "Thunderbird is not responding". Why is this and what can I or you do to stop this. It is very frustrating because it is happening most of the time, for years. Took our computer in and they removed any interfering programs. Still having the same not responding. Changed internet from Peak to Comcast still have the Not Responding. Have Trend Micro Security. If this does not get resolved in the next week will remove Mozilla and go to gmail.