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 (Not Responding)

  • 3 cavab
  • 3 have this problem
  • 4 views
  • Last reply by Wayne Mery

more options

While browsing my e-mails Thunderbird will suddenly stop and at the top of the screen say (Not Responding). Happens a lot of the time and not for the same length of times. HELP

While browsing my e-mails Thunderbird will suddenly stop and at the top of the screen say (Not Responding). Happens a lot of the time and not for the same length of times. HELP

All Replies (3)

more options
more options

ThunderBird not responding Fix (Safe Mode) Thunderbird is sensitive to other program activity. Please start *Windows'* safe mode with networking enabled - win8 https://support.microsoft.com/en-us/help/17076/windows-8-startup-settings-safe-mode Still In Windows safe mode, start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird We did as this instructed: call our computer tech, Tech said this safe mode is a band-aid fix, and the TREND MICRO security no longer works if running in safe mode. What security is compatible with Thunderbird?

more options

Safe mode is primarily a diagnostic tool, which your tech should understand.

Trend certainly won't be running (unless you started it manually) if you started Windows in safe mode. That's by design. As for what to run or how to tweak AV, see https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues