However, you can delete the parent.lock file manually. If the file is not deleted automatically, it may cause issues such as Thunderbird won’t open. Thunderbird creates parent.lock file every time it starts and automatically deletes the file when it closes. To restart the modem, just press the Power button on your modem, wait for a couple of seconds, and then turn it back on again. Several users have reported fixing the Thunderbird won’t open issue by simply restarting their modem. Methods to Resolve the Thunderbird won’t open in Windows Issueīelow, we’ll be sharing some simple yet effective methods to resolve the Mozilla Thunderbird won’t open issue. Thunderbird won’t start already running.Thunderbird doesn’t start/profile missing in Safe Mode.Thunderbird doesn’t respond or Thunderbird becomes unresponsive.Mozilla Thunderbird won’t open in Windows.Here are some common issues that Thunderbird users have reported: However, Mozilla Thunderbird is not free from issues and errors.

You can use Thunderbird with any platform, such as Windows, Mac, Linux, etc. You can also install several add-ons that allow you to enhance your emailing experience. The best part is that it is free as it is an open-source project.

This desktop-based application gives you complete ownership over your email messages and even manages your chats, news feeds, and newsgroups at a single place. Developed by Mozilla Corporation, Thunderbird is one of the most trusted email clients available in the market right now.

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