I downloaded Thunderbird again, and it kept everything but as soon as I move the mouse I get "Not Responding" I've also turned off Add-Ons and the spellchecker. The green "loading" bar, botton right never completes, it stops part way across. All the settings have been checked and are the same as on my laptop which works OK.

Start *Windows'* safe mode with networking enabled - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode Then, sStill In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Does problem go away?

That worked!!! But what happens when I try a normal start for W10 and Thunderbird?

It doesn't work with a normal start.

Why can't I read the replies with solutions to the questions?

If the problem disappears when Windows and Thunderbird are running in safe mode, then what can be done to correct the problem?

Wayne Mery said

Start *Windows'* safe mode with networking enabled - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode Then, sStill In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird Does problem go away?

I like Thunderbird, it has a lot of useful features but to have to go into safe mode for it to work without encountering "Not responding" I believe is absolutely ridiculous. What other software need that? Come on Mozilla; fix it!!

Wayne Mery said

Start *Windows'* safe mode with networking enabled - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode Then, sStill In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Does problem go away? </blockquote>

I FOLLOWED YOUR INSTRUCTIONS, WAYNE, AND IT DIDN'T WORK THE FIRST TIME. I REPEATED THE PROCESS THEN RE-INSTALLED TB 60.6.1 AND THAT SEEMS TO HAVE FIXED THE PROBLEM. CHEERS!