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

Ati ti èròjà atẹ̀lélànà asì ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window.

  • 1 èsì
  • 1 ní ìṣòro yìí
  • 2 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ Zenos

more options

Since I was getting abovementioned error, I have uninstalled previous version of thunderbird and installed version 38. Still i am not able to start thunderbird. First error is Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window. After closing receiving following error Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window.

Since I was getting abovementioned error, I have uninstalled previous version of thunderbird and installed version 38. Still i am not able to start thunderbird. First error is Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window. After closing receiving following error Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window.

All Replies (1)

more options

Have you looked for and removed a lock file?

http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file