That's what I will do first.You said you have 3 systems running Ultimate from Anytime Upgrade, if the
two other systems are working you could run the key finder program on
those and don't use those keys on the system you have to rebuild.
BTW, the way I understand your first post, the key Belarc reported is the
key for Ultimate but you tried to use it with Home Premium which of
course would not work. What I would do, is install Home Premium without
entering a key (and without activating it) and try to upgrade it
immediately with the Anytime Upgrade file this time using the key
reported by Belarc and see if it works.
Thanks for the help.