Fix: Thunderbird Will Not Open Windows 10

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Thunderbird Will Not Open Windows 10

Mozilla Thunderbird is one of the most trusted email clients on the market available on various platforms used not only as an email client but also as an RSS feed and much more. And the best part? It’s an open source project.

According to users, sometimes your Thunderbird user profile can get corrupted, and that can lead to this problem. The simplest way to address this issue is by deleting the ‘parent.lock‘ file found in the profile directory. You can do that by following these instructions:

  1. Close Mozilla Thunderbird.
  2. Right-click on the Taskbar and open Task Manager.
  3. Under Processes, find and kill all Thunderbird-related processes.
  4. Now, press Windows key + R to bring up the Run command.
  5. Type %appdata% in the command line and press Enter.
  6. Open the Thunderbird profile folder.
  7. Find and delete the parent.lock file. You may need administrative permission to do so.
  8. Start Thunderbird again. It should now function without any problems.

Thunderbird will not open: Method 2: Restart and reset your modem

Several users say they fixed the issue with Thunderbird simply by restarting their modem. This is rather simple, you just need to press the Power button on your modem, wait for a few seconds and then turn it back on again.

Once your modem restarts, check if the problem is still there. If the issue persists, you need to reset your modem. To do that, you just need to press and hold the hidden Reset button for a couple of seconds. For more information on how to reset your modem, we suggest that you check its instruction manual.

If the issue is resolved after resetting your modem, keep in mind that you might have to set up your wireless connection and other settings again.

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