Thunderbird freezes in win 8.1 and win 10, even with WinDefender off, and even after folder compacting
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!!
All Replies (6)
Start *Windows'* safe mode with networking enabled - http://windows.microsoft.com/en-us/windows-10/change-startup-settings-in-windows-10#v1h=tab01 - win8 http://windows.microsoft.com/en-US/windows-8/windows-startup-settings-including-safe-mode Still In Windows safe mode, start thunderbird in safe mode - http://support.mozillamessaging.com/en-US/kb/safe-mode
Does problem go away?
The problem went away while in safe mode. But it came back as soon I rebooted in normal mode.
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?
I posted the tasks in an uploaded png
Just read inthis bug report That toggling Hardware acceleration helped.
On the toolbar 
> Options > advanced > General
Give it a got and let us know
No, it is still freezing all the time!