Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Windows 10 - Thunderbird Hangs consistently

Thunderbird Rozwězanje problemow
christ1 wótegronjony
delpi767
delpi767

With Windows 10, Thunderbird (38.4.0) and all previous versions hangs at random times. I have not been able to find one specific thing that causes it to hang. It hangs with a not responding message and recovers after one to two minutes.

It is truly to the point that I have had to switch to Windows Live Mail because of unreliability.

In Windows safe mode TB seems to work okay but I can't leave the machine in that mode too long because it disables too many things.

In TB safe mode the problem, as described above, is still there.

I can confirm that the problem occurs with all anti-virus software disabled.

I will be happy to work with you f to find a solution.

With Windows 10, Thunderbird (38.4.0) and all previous versions hangs at random times. I have not been able to find one specific thing that causes it to hang. It hangs with a not responding message and recovers after one to two minutes. It is truly to the point that I have had to switch to Windows Live Mail because of unreliability. In Windows safe mode TB seems to work okay but I can't leave the machine in that mode too long because it disables too many things. In TB safe mode the problem, as described above, is still there. I can confirm that the problem occurs with all anti-virus software disabled. I will be happy to work with you f to find a solution.

Wšykne wótegrona (1)

christ1
christ1
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In Windows safe mode TB seems to work

Windows safe mode disables anti-virus software, which is most likely the culprit.

Create an exception in your anti-virus software for the Thunderbird profile folder, so that the anti-virus real-time scanner will not scan it.

Don't let your anti-virus software scan incoming and outgoing messages.

Don't let your anti-virus software scan attachments.

Don't let your anti-virus software intercept your secure connection to the server.

Remove any add-ons your anti-virus software may have installed in Thunderbird.