Hi, I am Van. I'll be glad to assist you today.
Once you upgrade the Windows with a pirated license key. The system will either deactivate or will remain activated illegally.
If you have a digital license linked to a Microsoft account that is currently in use. If you used it to activate another PC. The previous PC will be deactivated or you will get an error on the new device that the license is currently in use.
Best regards,
Van