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Thunderbird won't open. When I try repairing or redownloading, it says must close before continuing.

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If I can't open it, I can't close it.

If I can't open it, I can't close it.

Chosen solution

Yeap, you are right, but what you don't know if that it might be open in Background and you can't see the process

Hit CTRL+ALT+DEL, go to the Process tab and find ""thunderbird.exe"", select it and hit ""End Task"" or just reboot your computer.

Try again, see what happens.

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Chosen Solution

Yeap, you are right, but what you don't know if that it might be open in Background and you can't see the process

Hit CTRL+ALT+DEL, go to the Process tab and find ""thunderbird.exe"", select it and hit ""End Task"" or just reboot your computer.

Try again, see what happens.