You could always try a system restore to a time when Office was working, its what its there for and if this does not work you can always undo the restore.
Thought of that, but that would undo the 4+hours spent today uninstalling/reinstalling/updating my AV. It might come to a restore, but right now the AV is more important than Office. I just keep thinking either it has something to do with the System Mechanic uninstall or all the changes the AV tech did today, but I don't know which is to "blame." I wish I'd thought to be sure everything worked after I uninstalled SM and before we did all the changes to the AV, but I just didn't think of it. :-(