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Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

When starting Thunderbird, a box comes up and says Thunderbird is already running when it is not (rebooting does not help).

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f-wils
f-wils
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I have also uninstalled and reinstalled Thunderbird. The same thing happens with Firefox.

I have also uninstalled and reinstalled Thunderbird. The same thing happens with Firefox.

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Toad-Hall
Toad-Hall
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This sounds like Thunderbird did not close properly. When you exit Thunderbird, allow the computer a few moments to fully close all processes before shutting down computer.

Access your Profile folder and delete the parent.lock file.

make hidden files and folders visible:

Locate your Thunderbird Profile folder:

If using Windows: C:\Users\Windows user name\AppData\Roaming\Thunderbird\Profiles\Profile name


  • Find the parent.lock file in your profile folder.
  • Delete that file.
  • close window - top right X
  • Start Thunderbird.