Hi I need to reinstall my Parallels and logically my windows 10. I installed all but I can not activate my windows. Even though I put my windows key at the beginning of the installation, the system installs with the generic key with 3V66T end. I tried to change the serial to my serial but windows does not accept. It is as if the computer has been locked. I tried the procedure of article ID: 123770. But it did not work. I tried through microsoft support but even with all their procedure they can not change the key (serial) to what I bought. So I can only think that the problem is in parallels 12. Can somebody help me?