Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Cannot get past error "Thunderbird is already running, but not responding..."

  • 1 reply
  • 0 have this problem
  • 6 views
  • Last reply by david

gil16
gil16
more options

Thunderbird wouldn't statt -- I keep getting an error message that "Thunderbird is alreay running, but not responding..". Killing the Thunderbird processes in the Task Manager or restarting my computer do not reslove this problem. I had deleted the user-name/appdata/local/thunderbird and the user-name/roaming/thunderbird folders and reinstall a newly downloaded copy of Thunderbird but the problem continue to exist....

Is it possible that there there is a problem outside Thunderbird, such as a wrong enrty at the registry that cuases this problem? how do I fix it?

I am running Thunderbird on a Windows 11 Home laptop.

Gil

Thunderbird wouldn't statt -- I keep getting an error message that "Thunderbird is alreay running, but not responding..". Killing the Thunderbird processes in the Task Manager or restarting my computer do not reslove this problem. I had deleted the user-name/appdata/local/thunderbird and the user-name/roaming/thunderbird folders and reinstall a newly downloaded copy of Thunderbird but the problem continue to exist.... Is it possible that there there is a problem outside Thunderbird, such as a wrong enrty at the registry that cuases this problem? how do I fix it? I am running Thunderbird on a Windows 11 Home laptop. Gil

All Replies (1)

david
david
  • Top 10 Contributor
more options

If you are using an antivirus program, check to see if it has the ability to bypass checking email.