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Upgraded to W10, downgraded to W7 unconventionally, won't activate
This is kinda a Windows 7 question, but I think Windows 10 might have changed my product key and now it's incompatible with 7 or something. Basically, I 'upgraded' W7 to W10 a while back and exceeded my W7 rollback date (wanted a clean install anyway) so I looked around and found this site which posted the old DigitalRiver W7 iso's. I downloaded my old version, installed it, and it won't activate. In trying to enter my product key it says "invalid character" when I type an N that is in the key (I checked to see what the key was in my W10 install using a program that reports it.) Note that I have both 7 and 10 installed on the same computer right now on separate partitions, in case that affects anything. Why won't it activate and how can I fix it? Am I boned?