Welcome to the Dell Community [NAME]  Yes you can. A W7 Pro COA will activate W10 Pro. A W7 Home COA will activate W10 Home. That will end when W11 is officially released. Best regards, U2
I recently bought an E6530 laptop which had installed WIN10 but no activated. I have read that I can maybe activate windows 10 with the key for WIN 7 pro attached in the battery case. Is it true?
LATITUDE E6530 WIN 10 ACTIVATION