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.

Avatar for Username

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

Denc nañu waxtaan wii. Yónneel yeneen laaj soo soxlaa ndimbal.

Thunderbird won't close properly and I can't restart the program. Any new ideas?

  • 1 tontu
  • 2 am na jafe-jafe bii
  • 5 views
  • i mujjee tontu mooy Toad-Hall

charmonar
charmonar
more options

I keep getting the error, "Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system", when I close and then later try to restart Thunderbird. The only fix is to either open Task Manager and kill Thunderbird that way, or to restart the computer.

I have searched the knowledge base on Mozilla online and have already deleted the Lock files from the Profile directory but this did not fix the problem. I also already went into Safe Mode and tried closing and restarting the program there. The problem does not occur in Safe Mode. Only in regular operating mode. I am running Windows 7 64 bit.

Any help would be greatly appreciated.

I keep getting the error, "Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system", when I close and then later try to restart Thunderbird. The only fix is to either open Task Manager and kill Thunderbird that way, or to restart the computer. I have searched the knowledge base on Mozilla online and have already deleted the Lock files from the Profile directory but this did not fix the problem. I also already went into Safe Mode and tried closing and restarting the program there. The problem does not occur in Safe Mode. Only in regular operating mode. I am running Windows 7 64 bit. Any help would be greatly appreciated.

All Replies (1)

Toad-Hall
Toad-Hall
  • Top 25 Contributor
more options

If you tried Thunderbird safe mode: Help > restart with addons disabled

and it worked ok, this means that one of your addons is causing a conflict. You will need to enable each addon extension, one at a time and test to see which one causes the issue. Maybe an addon needs to be updated.

Toad-Hall moo ko soppali ci