We did the change, rebooted, no error message but the window for entering values for functions was not popping up, tried to run the bat file in REG5 folder, could not run it without an error. Changed UAC back to never notify, rebooted, ran the bat file in REG5 without issue, tested biznet failed. Changed UAC back up 1, rebooted, opened Excel Biznet did not error, pop-up window for entering functions values was not appearing rebooted a third time to make sure UAC was set to the one from the bottom, tested, could run biznet Excel files. Changed UAC back down to never notify, rebooted, loaded Excel wouldn't work, changed back up 1 rebooted, loaded Excel and was working. Note all windows updates were installed.