Hello Dona,
We are sorry that Thunderbird is not working after installing AVG Ultimate. Please confirm whether Thunderbird works fine after disabling AVG. If you have not checked that, then please disable AVG Ultimate using this article ( http://support.avg.com/SupportArticleView?urlname=How-to-use-Passive-Mode ) and check if Thunderbird works fine. If so, please get back to us and we are here to assist you anytime.
Thank you.
Thunderbird email wont work after installing AVG Ultimate
Hello Dona,
We are sorry that Thunderbird is not working after installing AVG Ultimate. Please confirm whether Thunderbird works fine after disabling AVG. If you have not checked that, then please disable AVG Ultimate using this article ( http://support.avg.com/SupportArticleView?urlname=How-to-use-Passive-Mode ) and check if Thunderbird works fine. If so, please get back to us and we are here to assist you anytime.
Thank you.