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

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
This thread was archived. Please ask a new question if you need help.
Archived

TB won't launch

Thunderbird Update
frisée replied
fessenden
fessenden

TB started giving the message, "Your computer must be restarted to complete a previous upgrade of Thunderbird. Do you want to reboot now? (Yes)(No)" I rebooted. Now everytime I try to launch TB I get the same message. Reboots don't solve it. TB won't launch. I suspect a TB 15 upgrade bug. How do I get TB to launch? If I do an uninstall, will I lose my address book(s) & subfolders?

TB started giving the message, "Your computer must be restarted to complete a previous upgrade of Thunderbird. Do you want to reboot now? (Yes)(No)" I rebooted. Now everytime I try to launch TB I get the same message. Reboots don't solve it. TB won't launch. I suspect a TB 15 upgrade bug. How do I get TB to launch? If I do an uninstall, will I lose my address book(s) & subfolders?

All Replies (1)

frisée
frisée

Save all your profiles first before uninstalling. Then you can put them back once reinstalled. https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data

Modified by frisée