I downloaded and installed NIS for three PCs, I began by installing the trial version on my sons PC using my credit card, I put it in my sons name using his email account. He has deleted the email account and I cannot log in to Norton to use the other two downloads because I dont remember the password and cannot recover it due to the deleted email account. its a paid subscription from my crredit card,and I have the key. how do I install it on the other two PCs?