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Thunderbird freezes in win 8.1 and win 10, even with WinDefender off, and even after folder compacting

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I already deactivated Windows defernder and already compacted folders, and Thunderbird is still freezing on each second mail I send, both in win 8.1 and win 10 (although it is worse in win 10) It almost unusable!!

I already deactivated Windows defernder and already compacted folders, and Thunderbird is still freezing on each second mail I send, both in win 8.1 and win 10 (although it is worse in win 10) It almost unusable!!

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The problem went away while in safe mode. But it came back as soon I rebooted in normal mode.

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Press the Windows + R keys to open the Run dialog, type msconfig, and click/tap on OK.

If prompted by UAC, click/tap on Yes.

What programs are listed on the startup tab?

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I posted the tasks in an uploaded png

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Just read inthis bug report That toggling Hardware acceleration helped.

On the toolbar > Options > advanced > General

Give it a got and let us know

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No, it is still freezing all the time!