Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Vyhľadajte odpoveď

Vyhnite sa podvodom s podporou. Nikdy vás nebudeme žiadať, aby ste zavolali alebo poslali SMS na telefónne číslo alebo zdieľali osobné informácie. Nahláste prosím podozrivú aktivitu použitím voľby “Nahlásiť zneužitie”.

Ďalšie informácie
Otvorené

Cannot start Thunderbird - "Thunderbird is already running, but is not responding."

Thunderbird Výkon a konektivita
Lin pridal odpoveď Pred 2 hodinami
bobh123usa
bobh123usa

I have Windows 11. I've used Thunderbird for many years. My PC recently stopped working. The Geek Squad reported that the OS was corrupted. They reinstalled the OS and the computer now works. But now I have a problem with Thunderbird (and several other apps).

When I try to start Tbird, I get an error "Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window."

Based on info I found in prior community messages, I opened task manager and ended the Tbird task. I then searched all of my drives and deleted all instances of parent.lock that had anything to do with Tbird or Firefox.

When I then try to start Tbird, I get the same error.

I am out of ideas on how I can get Tbird to open.

I have tried uninstalling and reinstalling Tbird, but that didn't solve the problem either.

Any ideas or suggestions? Thanks.

I have Windows 11. I've used Thunderbird for many years. My PC recently stopped working. The Geek Squad reported that the OS was corrupted. They reinstalled the OS and the computer now works. But now I have a problem with Thunderbird (and several other apps). When I try to start Tbird, I get an error "Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window." Based on info I found in prior community messages, I opened task manager and ended the Tbird task. I then searched all of my drives and deleted all instances of parent.lock that had anything to do with Tbird or Firefox. When I then try to start Tbird, I get the same error. I am out of ideas on how I can get Tbird to open. I have tried uninstalling and reinstalling Tbird, but that didn't solve the problem either. Any ideas or suggestions? Thanks.

Všetky odpovede (1)

Lin
Lin
  • 10 najlepších prispievateľov

What you did is part of the troubleshooting process, but it only fixes one possible problem, which is, if Thunderbird's interface were to crash but the program keeps running invisibly in the background. Rebooting the computer should also fix it.

Another thing that can cause this kind of condition and error message is of there is a "lock file" present when you try to start Thunderbird. A lock file is simply a small file that is created inside your Profile that will prevent you from starting a second instance of the program while one is already running, This is to prevent your email data from becoming corrupt.

Sometimes that file can be left behind if Thunderbird is not closed cleanly. If you are confident that there really are no other instances of it running, that file can safely be deleted. This article talks about the situation in more detail and explains how to remove the file

Profile in use https://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

Položiť otázku

Ak chcete odpovedať na príspevky, musíte sa prihlásiť do svojho účtu. Ak ešte nemáte účet, položte novú otázku.