Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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

"Not Responding"

  • 7 replies
  • 1 has this problem
  • 3 views
  • Last reply by Wayne Mery

more options

I am using Win10, Thunderbird 115.2.0. When deleting new emails, thunderbird is very slow, get message "Not Responding" does not occur every time but more often than not Thanks

I am using Win10, Thunderbird 115.2.0. When deleting new emails, thunderbird is very slow, get message "Not Responding" does not occur every time but more often than not Thanks

Chosen solution

All Replies (7)

more options

What is your anti-virus software?

more options

Norton 360, already tried disabling, no joy

more options

Try to start Windows 10 in safe mode with networking enabled.

Does the problem go away?

Windows safe mode disables anti-virus software. This is a troubleshooting step, not a solution.

more options

NO Joy............. Thanks for suggestion

more options

Chosen Solution

https://wiki.mozilla.org/Thunderbird:Testing:Memory_Usage_Problems has a fairly comprehensive list of items to check.

more options

after clearing all data, deleted messages, trash, etc the problem is solved.......... Many Thanks for all who gave me suggestions!!!

more options

How many messages were in trash? Which action do you think resolved it?