This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Thunderbird freezes and goes not responding when deleting certain emails

  • 3 cavab
  • 1 has this problem
  • 19 views
  • Last reply by christ1

more options

Ever since I archived a few thousand emails I have been a problem with my Thunderbird freezing and "not responding" for 15-30 seconds after I delete certain people's emails in my inbox. I am running Windows 7 (64 bit) and have Microsoft Security Essentials running.

Ever since I archived a few thousand emails I have been a problem with my Thunderbird freezing and "not responding" for 15-30 seconds after I delete certain people's emails in my inbox. I am running Windows 7 (64 bit) and have Microsoft Security Essentials running.

All Replies (3)

more options
more options

Problem went away. When I have Windows in non-Safe Mode and Thunderbird in safe mode the problem still occurs.

more options

The culprit is most likely MS Security Essentials. Make sure not to let it scan your Thunderbird profile folder. Don't let it scan incoming and outgoing messages, and attachments.