Lol... I just re-settled my PC, and re-load SS5, with my licensed serial #, and now trying to load SS 8.2.1, and asked me , my serial number, which I provided (SS5 #) , and it does not work. It tells me that the serial # is not valid.... What can I do please. ??? (Also I tried my email link to do so, but the link has expired.) Thanks.