Not sure how to post a reply on this. I saw the other threads and they did not help except turning of Email scanning. Windows 7 o/s 6gb ram i3 chip. Usually quick enough for anything I do.
Make sure you are logged in as this new board tends to log one out rather unexpectedly. Then click the reply button at the bottom right of your original thread: why is thunderbird so slow
I'll lock this one as a duplicate.