I'm stuck in an endless loop with T-Bird this morning – each time I try to open T-Bird, I get the ''"Your computer must be restarted to complete a previous upgrade of Thunderbird. Do you want to reboot now?"'' popup. Yes, I do want to reboot. And I've done it four times already. And each time I reboot, I get the same popup. So ... what is the workaround? What is the fix? I'm using Windows, and whatever the browser version of T-Bird is. I would tell you which version, but I can't open my email program. Thanks in advance for your help! DJ