well, using USB flash drive to create a password reset disk is a good way to recover or reset Windows 7 password, you can see this article of how to reset Windows 7 password
the most fast and convenient way is to use the third-party software to reset the password, it is quite easy to use, and you do not need to worry about losing any important data, such as the Windows Password Reset in pwdspy.com
firstly, try to write some clues that may remind you of the password, and type it to see if it is the right password, if it still does not work, you could try some professional windows password reset software, like Pwdspy Windows Password Recovery