From a number of threads, I understand I cannot move programs from my old Win 7 HDD, installed as a second HDD in a new computer running Win10. To reinstall in Win 10, the licencers tell me I have to uninstall in Win 7 before reinstalling in Win 10. Original Win 7 motherboard is fried. Can I launch Win 7 from the original HDD installed in the Win 10 machine, if so how? I can see all the program files etc.