I am having the exact same problem which you seem to understand better. Two sessions of tax prep after downloading the software without any problems. Then I got into the same hopeless loop with the updater. It dialog box you describe with "unknown publisher" doesn't look right. Not the Turbo Tax theme colors. Have you been able to sort it out? do you know whether uninstalling Turbotax and reinstalling and starting all over (ugh!!!) might take care of it?
