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Thuderbird uses 100% CPU

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  • 1 has this problem
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  • Last reply by DavidGG

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Thunderbird gets to 100% CPU usage, stays there for hours, and the only solution is to kill it. Any idea, what could be the reason?

Thunderbird gets to 100% CPU usage, stays there for hours, and the only solution is to kill it. Any idea, what could be the reason?

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Start Thunderbird in Troubleshoot Mode. The following article explains how to do that and why it can be useful to help identify the cause of a problem:

https://support.mozilla.org/kb/troubleshoot-mode-thunderbird

What's your operating system? If Windows, start in Safe Mode with Networking mode:

https://support.microsoft.com/help/12376/windows-10-start-your-pc-in-safe-mode

Does any of that cause the problem to go away?

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