Recovery help
I have an early-2011 MB Pro, OSX 10.7.5. I want to do a complete, "back-to-factory-spec" restore. All personal files have been backed up, so I'm ready to go. I've read that I can do the restore by using "CMD-R" upon startup, then follow the prompts to access Utilities in the Recovery partition, and go from there. However, when I start up (pressing CMD-R), I end up at a screen showing a padlock with a password bar below. I typed in my Admin password, but it wouldn't take. After research, I've learned this is for the "master password", which I don't have (I bought this used 3.5 years ago, and cannot get in touch with the seller).
I have researched extensively, but everything I've seen so far goes right back to using CMD-R, or something similar (CMD-S, Terminal script, etc.), which ALWAYS leads me back to this "master password". Is there a way to "bypass" this password (again…NOT my Admin pass, but the MASTER pass)? Can I do something within System Prefs or Utilities to do so? Any options? Is this possible without having to spend the $$ to use Apple Support?
I'm trying to do this, because I want the "fresh install" that I thought I'd received, but have since discovered I didn't. Any/all help is greatly appreciated. Thanks!
MacBook Pro, Mac OS X (10.7.5)