thunderbird v 45.7 not responding

[csutak40]

I have two computers, one Win7 and the other Win10. On both, (it updated itself yesterday) I get "not responding" seconds after I open it. Regardless if how long I leave it, it never becomes responsive
I tried safe mode, same result.
FWIW, I am not using IMAP

[DanRaisch]

What security software are you running on those systems?

[csutak40]

What security software are you running on those systems?

I am using BitDefender and TBH, I was starting to suspect that it was the culprit. I have had lots of problems with it, seem to be in a permanent correspondence with them. I have tried to disable it temporarily in the past, couldn't find the setting for it. A guru friend of mine couldn't find it either. Wrote to them to ask how to do it, never got a reply
I have, just now, found directions on how to do it on Google and tried it.
Afraid it didn't fix the TB problem
Just for the fun of it, my Win10 laptop just died (some hardware problem, I think) So, I can now only experiment on the Win7 desktop

[DanRaisch]

You can try starting that Win 7 system in Windows Safe Mode, with Networking, to eliminate the impact of the security software. https://support.microsoft.com/en-us/hel ... -safe-mode Often simply "disabling" an anti-virus or firewall will only disable the user interface but leave the scanning/blocking functionality running.

[csutak40]

You can try starting that Win 7 system in Windows Safe Mode, with Networking, to eliminate the impact of the security software. https://support.microsoft.com/en-us/hel ... -safe-mode Often simply "disabling" an anti-virus or firewall will only disable the user interface but leave the scanning/blocking functionality running.

I did try in Win 10 the other day, but just tried it in Win7, just in case - still no good

[DanRaisch]

Clear the browser cache and the Windows Temp directory.
Shutdown any anti-virus software you are running.
Download a new copy of the full installer from http://www.mozillamessaging.com/en-US/thunderbird/
Delete the directory C:\Program Files\Mozilla Thunderbird
Run the installer.
Restart the anti-virus program.

Note that your saved messages, address books, settings, passwords, etc (if any) are stored in a different directory from the program files and will not be removed by deleting the directory identified above.

This thread http://forums.mozillazine.org/viewtopic ... 5#p5239885 has a more detailed version of the above instructions if needed.

[alarmist]

Had this same problem. It was working fine on an identical machine. Went through the forum, tried a bunch of solutions. Nothing helped. Continuously hung up with the message "not responding." Tried deleting and re-installing, and was perplexed the email accounts would magically be configured on re-install. Perplexed because I used Revo Uninstaller (free version) set on moderate and deleted, I thought, all the registry entries and leftover files. So I tried again using Revo set to "advanced." That did it. Whatever jacked up bag of code was causing the issue got ripped out by the roots using that method. You'll know it's really been uninstalled when you re-install and the email accounts are not still there. I did export the address books to my desktop using the LDIF format and then import them into the new installation. Everything else was fresh and it now works flawlessly once again.

[wsmwk]

You can try starting that Win 7 system in Windows Safe Mode, with Networking, to eliminate the impact of the security software. https://support.microsoft.com/en-us/hel ... -safe-mode Often simply "disabling" an anti-virus or firewall will only disable the user interface but leave the scanning/blocking functionality running.

I did try in Win 10 the other day, but just tried it in Win7, just in case - still no good :cry:

In Thunderbird bug reports we have recently been finding some issues resolved by deleting Thunderbird cache.

With Thunderbird shut down, navigate to %localappdata%\Thunderbird\profiles\ using instructions at https://www.nextofwindows.com/how-to-ac ... -windows-7

From there drill into your current thunderbird profile cache, typically a name of the form xxxxx.default (where xxxx is a randomish string), and it should have a recent date.

You should see numerous directories and files with cache in the name. Delete everything there. Then start Thunderbird.

[csutak40]

The problem is finally solved. Thank you very much for the replies. Had a guru friend over and he tried all sort of things. Started TB in safe mode (I was trying Windows in safe mode earlier) didn't even know that one could start TB in safe mode and it turned out that it was the Google Calender add-on that was causing the problem.
Having disabled it, it now works fine

[DanRaisch]

Thanks for reporting which extension was causing your problems.

[DN123ABC]

Bug 1303381 - Lightning takes very long to respond when Google Calendar connected
https://bugzilla.mozilla.org/show_bug.cgi?id=1303381