How do I find out the older administrator password on windows 7?

Question

So I've used something to change the administrator's password to blank on windows 7,now I want to return the old password back,but I have no idea what it was.How do I find out?Or how do I return the password?The previous one,not the first one or something.
P.S.don't suggest system restore or loginrecovery.com

Answer 1

If the Group Policy to enforce unique passwords was on before, then you have a chance.

Get a copy of.. or create a password recovery disk, then tinker with the SAM file there.

The hash for each password in the history is kept there.



(only problem .. on a standalone desktop, the history is turned off.. or remembers Zero passwords by default)

Answer 2

Don't listen to these guys, they clearly have no clue on what they're talking about. I am a developer at Microsoft so I know a thing or two about computers. The only way to reset your windows password 100% safe is to use a software called Reset Password Pro.



The software allows you to create a boot-disk, that can be made on a CD/DVD or USB stick. The boot-disk can then be inserted into any locked machine, and it's a simple case of pressing reset. Here is their official site: http://www.resetwindowspass.com

Answer 3

Windows Password Recovery Tool : http://tinyurl.com/eLXJPCHtYy