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Just in case, I recommend you to make a backup and erase everything on the internal disk. To delete the Boot Camp partition, open Boot Camp Assistant and follow the steps.
How can I downgrade and use my 7 license on the new bootcamp?. Will it work? Thanks again...
You shouldn't have any problem activating Windows 7 on a new MacBook Pro because, if I'm not wrong, you can activate 3 computers with one Windows 7 product key (or similar)