I should have put my os, Windows 10 Home 64-bit OS x64-based processor. Intel cpu i3-2100 @ 3.10GHz. Thunderbird is 115.6.1 and 32 bit . Is that right 32 bit, I have auto updates so not something I have altered. Other observations are: Putting unread mail in the trash and then empty trash, it stays visible until you go to inbox then back to trash. Trash is then clear but the toolbar visible thunderbird icon still has 2 unread (in red) mails way after they have been deleted. Clicking get new msgs clears them.

What crash report IDs are listed at Help > Troubleshooting?

None listed for the past 3 days, under all crash reports just one from 11 march 23 so not relevant I guess.

What I see when it crashes is either a black screen or it just freezes, when I click the close button I get this programe is not responding and sending a report to microsoft, then it shuts down.

Only a couple of crashes/lockups on thunderbird in the last day or so but a new error has raised it head. I have 5 different email addresses set up in TB and nothing has really altered in that respect for years. All can send and receive msg's without need to do anything but hit the send/get msg button. Yesterday one address changed a setting all on its own. The outgoing server (SMTP) should have read joeblogs@mynett.com - smtp.mynett.com But somehow changed itself to another of my email addresses steveblogs@mynett.com - smtp.mynett.com This meant that I had an authentication password box appear when sending mail, where normally the mail would just go. I have since changed this back to joeblogs@mynett.com - smtp.mynett.com and got it to stick (so far)

Anyone any ideas? or shall I just revert to an earlier version via my restore function?

1. Start Windows in safe mode with networking enabled - https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode 2. Still In Windows safe mode, start Thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Does problem change?

Thunderbird is 115.6.1 and 32 bit . Is that right 32 bit, I have auto updates so not something I have altered.

Thanks for your reply Wayne, I mentioned the above in my 2nd msg, as my system is 64bit it worried me that it may not be correct, so instead of using windows recovery to revert back to an earlier version of Thunderbird I chose to just try a manual install of Thunderbird from the website. It installed over my current install, kept all my settings and low and behold it installed the 64bit version Now its only been 24hrs or so since the install but so far so good. I will monitor for a couple of days and if its ok I will come back and close this thread.

Well Thunderbird is still getting to a stage where I get "not responding" after maybe 1hr or 20hrs. Close the programme then reopen it and all is well again for an undetermined time. I tried running it in safe mode with the same result. I updated it to 115.7.0 (64-bit) but still it does the same.

I think I have now had enough of the update and would like to revert to 102.15.1 which ran fault free on my pc. I have located the exe file for this version and would just ask can I straight install this ver over the supernova or do I need to jump some hoops to keep all my data intact?

I straight install this ver over the supernova or do I need to jump some hoops to keep all my data intact?

I would not go there. You need to force Thunderbird to use your converted profile folder using the -allow-downgraded command line argument. Anything in the profile that was "converted to a new file format" will be lost.

I to have issues with random stoppages. Rebuilding the global index helped but was not in itself a cure. With loads of Ram (32Gb) and a terabyte SSD under the hood, Thunderbird should fly. But it just chugs along grinds, gets hung up deciding what to index and is generally very pedestrian. Upgrading to windows 11 did not fix it. Going back to 102 is not in my future. I would be more likely to change applications that try and go back. The outcome of downgrading is just so much in the lap of the gods. It might be Ok, it might not.

I should note to be fair it is not just Thunderbird. Firefox is no better with the little naps and the missed keystrokes, so there is probably a fundamental issue in the Mozilla core both are built on. It got so bad am back to a wired keyboard and mouse to eliminate that as a possible cause. I do agree 115 is more prone to having a nap that 102 ever was. But it was not golden by any reasonable standard.

Perhaps it is the non intel processor or something. I am somewhat at a loss really and just do not have time to devote to the issue. I think a much more likely issue is the indexing code is more than 10 years old and is simply not efficient enough for the much larger profiles of mail and RSS feeds that exist now than did a decade ago. Unfortunately I rely on search, so can't really drop it. But my daily profile which only has two account and very few email does not suffer from the dropping off at anything like the level my main profile does.

Processor AMD Ryzen 7 PRO 4750G with Radeon Graphics 3.60 GHz Installed RAM 32.0 GB (31.4 GB usable) System type 64-bit operating system, x64-based processor