You received the activation code when you purchased the program. A new one can not be provided with you on this forum.
However, if you've registered the program, you can find it online by logging into Adobe.com and then clicking on the Manage Account button. On the page that opens, select Plans at the top of the page then, on the next page that opens, click My Products on the left side of that page.
Though you are working with a relatively ancient product. There are no guarantees it will work on Windows 10 or that it will edit any current video formats. (Version 7 was released when most people shot video on miniDV tape.)