Recently, TeaTimer has been blocked from starting up by Vista's Windows Defender.
I've not been able to determine why this is happening, or how to set it to be allowed to run. I've had to right-click the icon, and select to run 'system settings protector' for TeaTimer to start.
I've looked through the list of startup programs in windows defender, but there's no option to allow it, and the classification is "not yet permitted".