What anti virus is this? I am wondering if the Firefox issue with AVG has found it's way to Thunderbird.

What is the Firefox issue with AVG???? I actually called AVG and they helped me turn it off so I could troubleshoot - because there is a lot of finger pointing in this community. Then we did a lot of looking around (remote access). This is actually my elderly mothers computer, I am a mac person and TimeMachine would have fixed it all. Just revert back to before it happened. This computer is running Windows 10. Apparently the only option is a reset, which would change everything, and her Carbonite only backs up data. What to do?

It all started because I had to find an email for her. When I opened Thunderbird, I was notified that it needed to update, so I said trustingly said ok (what a BIG MISTAKE!)

It did not simply "update" it REPLACED THE WHOLE PROGRAM! I am simply astounded, and trying to fix it before she discovers that a decade (or more) of emails that she had organized into folders ARE GONE! How can that happen?

There is no record in her system of a previous version, and since she only emails from her computer (no devices or remote logins) she was never fully updated to IMAP. The good thing is that some of it was. Just none of her folders which I assume were on her system only. I am about to update her email password (since there is no record of it) but that will not get everything back. I really don't know what it will get back, if anything. I guess I just really want to know WHAT HAPPENED????

I have ZERO faith in Mozilla now, and I use Firefox on a Mac! I got caught up in the last debacle when it went dark for a couple of days. Geez.... at least I was smart enough to wait it out (after spending hours trying to figure out what was wrong - because they didn't bother to post anything - and it happened when I was in the middle of a project requiring me to use the internet). If I had tried any of the fixes floating around, I would have just made it worse.