I'm not sure what you are asking for, but we'll need some info:
If you're using Windows, the password is stored in a database. From my understanding, there are ways to reset, but it's not quite as easy to recover it. I've been successful with OrphCrack and Active@Boot.
It is not just stored in a text file for you (or anyone) to open.
I guess the question is what Operating System? What are you trying to do? What will you need the Admin password to do? If this is your system, have you misplaced your admin password?