Thunderbird 45.4.0, with 10 Windows, works very very slowly; Help!

I used Thunderbird for years; upgrade to Windows 10 months; with Thunderbird 45.4.0, everything was fine until a week ago, when Thunderbird has started running very slowly. I type the text and it does not appear on the screen for a few seconds and everything seems to get slower to the point now, it's almost unusable. My security system is Norton Security. Help! Thank you! I uninstalled and reinstalled Thunderbird 45.4.0, which didn't help, and now the program freezes ("not responding") constantly, where it serves to do that often but it's not much. Any help is appreciated!

Start * Windows * safe mode with active network - win10 https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode

Always in Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Problem disappear?

Tags: Thunderbird

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