I have purchased and activated software from many, many vendors and nobody else's has caused me to land in this tiresome endless loop. the decision has caused me to log in and enter my serial number probably 500 times - every time I reboot.
Because this approach doesn't work (in my case). But it was Adobe's decision to tie my CS6 software to my computer's Machine ID. (1) I empathize with the difficulties inherent in getting one's own software to play will with another company's. Brett, thank you for your reply and insights.