10-01-2011 11:14 PM
There is a very detailed and informative guide available at below link which answers your question
I am an HP employee!!
04-08-2013 07:50 PM
There is also a lot of password recovery software out there to either to change Windows 7 starts up passowrd. As for free program, Ophcrack is the best choice. But without basic password cracking knowledge you may can't get it to work. The recovery time mainly depends on the complexity of your passwords. In other words, if your password is too long or you are computer newbies, it doesn’t work at all. So you had better try the most powerful and easy-to-use windows password reset tool such as Windows Password Key.
For more: http://www.lostwindowspassword.com/windows-password-recovery.htm