A. Start *Windows'* safe mode with networking enabled - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode Still In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird Does problem go away? Please reply to let us know results.

B. Please post your crash IDs per https://support.mozilla.org/en-US/kb/mozilla-crash-reporter#w_viewing-crash-reports

Thanks Wayne. Unfortunately I got the same result, "Thunderbird Not Responding" Crash report ID: 4b535be1-f0ea-4cf9-a011-c9a052160930

So you only crash when you do Help | About? Your crash https://crash-stats.mozilla.com/report/index/4b535be1-f0ea-4cf9-a011-c9a052160930#tab-details is happening in Windows' code, not Thunderbird code. Perhaps something in https://www.google.com/search?num=20&safe=off&q=%22dui70.dll%22+crash+%22explorerframe.dll%22&oq=%22dui70.dll%22+crash+%22explorerframe.dll%22&gs_l=serp.3...60206.68528.0.69227.8.7.1.0.0.0.102.527.6j1.7.0....0...1c.2.64.serp..0.5.304...0i22i30k1j33i160k1.RtmfZXDOsFY will help.

Beyond that, I'm not sure what your problems might be. You might try downloading Thunderbird from https://www.mozilla.org/en-US/thunderbird/ and installing

Thanks. No, crashes happen whenever I try and do anything in TB other than send, receive or delete. eg file, detach attachment, save attachment etc. I will have a look at the files you suggested. I should have perhaps said that use the Chrome browser. I have uninstalled and re-installed several times to no effect.

Thunderbird not responding and a crash are two completely different things.

Are you crashing or is the program not responding? (Yes, I see one crash report. there have been 8 of them in the last 7 days)

The first thing that happens is 'not responding', around 20 seconds later TB closes and posts a crash report.

> The first thing that happens is 'not responding', around 20 seconds later TB closes and posts a crash report.

This is somewhat typical that it comes in pairs- different things, but related

Wayne Mery said

So you only crash when you do Help | About? Your crash https://crash-stats.mozilla.com/report/index/4b535be1-f0ea-4cf9-a011-c9a052160930#tab-details is happening in Windows' code, not Thunderbird code. Perhaps something in https://www.google.com/search?num=20&safe=off&q=%22dui70.dll%22+crash+%22explorerframe.dll%22&oq=%22dui70.dll%22+crash+%22explorerframe.dll%22&gs_l=serp.3...60206.68528.0.69227.8.7.1.0.0.0.102.527.6j1.7.0....0...1c.2.64.serp..0.5.304...0i22i30k1j33i160k1.RtmfZXDOsFY will help. Beyond that, I'm not sure what your problems might be. You might try downloading Thunderbird from https://www.mozilla.org/en-US/thunderbird/ and installing

Hi again, looked though these files but they are way beyond my competence or understanding - thanks anyway

Then here is what I suggest

1. Download Thunderbird from https://www.mozilla.org/en-US/thunderbird/ and install it. If the problem continues...

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

Please reply to let us know results.

Same thing I'm afraid the only difference being with both in safe mode I did not get the 'not responding' TB just crashed after about 20 secs.

Which AV software?

Windows Defender

There are two potential ideas listed in https://superuser.com/questions/1011412/explorer-crashing-repeatedly-in-win-10-ver-1511-explorerframe-dll-culprit

Another at https://answers.microsoft.com/en-us/ie/forum/ie11-iewindows8_1/unable-to-add-email-attachments-to-gmail-in-ie/5a028967-05a3-4a01-ad57-e0c1e8e76ddc talks about video files on the desktop causing a problem. In your case it might not be the desktop, but whatever folder that would be opening when explorer is started.

Tried first solution no change in TB behaviour. Tried 2nd fix - sf/scannow and repaired damaged files but no difference to TB problem other than it now goes straight to crash rather than 'not responding' first. Checked start up, no video files opening on start up

Please post your crash IDs. see https://support.mozilla.org/en-US/kb/mozilla-crash-reporter#w_viewing-crash-reports

bp-47bf07b6-cfc5-415e-8f4d-81e332161004 04/10/2016 17:37 bp-d977f0c2-0189-4447-82e1-eb9ce2161004 04/10/2016 17:37 bp-3d000e92-2c28-4b64-a2f2-97da02161004 04/10/2016 11:44 bp-2a6e048c-f561-4290-96b7-084f02161004 04/10/2016 11:36 bp-934e4aab-666f-4e7a-ac82-0aa452161004 04/10/2016 11:24 bp-b5ea3c09-5691-4ddd-8492-fc4632161004 04/10/2016 11:24 bp-0b822103-e69f-4da2-899a-f219f2161004 04/10/2016 10:32 bp-0ff0a6b2-b2db-4da0-8a1f-8889f2161004 04/10/2016 09:56 bp-0c5f3b23-6b97-4c42-9364-48f332161004 04/10/2016 09:54 bp-aa733974-fef0-46b9-9837-568dc2161003 03/10/2016 13:17 bp-cfcf316d-b82d-421b-92eb-de2622161003 03/10/2016 13:11 bp-fe79efce-9ee0-4e71-a0ef-bb8b12161002 02/10/2016 10:03 bp-7b982ee7-03d9-4258-89b2-570542161001 01/10/2016 10:17 bp-6682acaa-74fe-41cf-ae14-270162161001 01/10/2016 09:00 bp-b395da7b-7db0-437c-9337-99c142161001 01/10/2016 08:32 bp-4b535be1-f0ea-4cf9-a011-c9a052160930 30/09/2016 21:05 bp-ca748cc0-0732-4426-a631-c99222160928 28/09/2016 12:11 bp-b1068475-0cfa-4278-8388-6c0a22160927 27/09/2016 21:44 bp-82c672f7-091f-49a9-817b-ac06f2160926 26/09/2016 13:51 bp-771f5b75-a3f9-46c8-ab5b-9f02b2160925 25/09/2016 10:58 bp-b82919d7-a926-441e-8cc3-6e38a2160920 20/09/2016 16:06

FWIW, as a 59-year old you are doing fine.

Good to know the crash signatures are all the same. Bad news is I don't have a solid solution for you, except to say that all indicators point to this not being caused by Thunderbird and therefore not solveable by Thunderbird.

If https://crash-stats.mozilla.com/report/index/b82919d7-a926-441e-8cc3-6e38a2160920 is your first crash, from Sept 20, you might consider what changed on your system or in your directories in that time frame.

Thanks Wayne Based on your advice I restored my computer to a point before Sept 20 and - wadayaknow - TB is working again. Thanks. I will try and keep an eye on what updates are installed and what their effect on TB is. Thanks for your help.

You're welcom.

Pretty weird. Glad you resolved it for now.