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Open Thunderbird

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On a laptop we get the following message when we try to open program: "Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window." I don't see any other instance of Thunderbird already running. HELP!!! Thanks!

On a laptop we get the following message when we try to open program: "Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window." I don't see any other instance of Thunderbird already running. HELP!!! Thanks!

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rightclick on taskbar (I am assuming you use windows) and click to open task manager. On that screen, highlight thunderbird, rightclick and select to close the task

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