You have not told us what product it is, and where you got it from. Adobe stopped selling licenses in 2012, and the software is subscription only.
If you can't register the license under your name, it isn't free and it isn't yours'.
You have reached Photoshop's user-based tech support and we do not deal with licenses. We are not Adobe employees.
If you tell me what you have, I can get your post to a group that can advise you.
I received the program from a friend, I want to check after the serial number if the program was SUBSCRIBED
ADOBE PHOTOSHOPE CS3
CS3 activation servers have been shut down. To not let legitimate customers out in the cold, Adobe issued a special serial number, to be used with a specific installer that doesn't require activation.
This is for existing customers only! To them it's offered for free.
If this is what your "friend" has sold you, you have been cheated. He has no right to sell it, and he himself hasn't paid for it.