No worries when you forget windows 7 password. The article will give you some ideas to reset HP Windows 7 password with USB flash drive, 

http://www.iseepassword.com/how-to-reset-hp-laptop-password.html

Hope it works!

Windows Password Key is especially designed to help HP computer users reset forgotten password for administrator.

Here are simple step to reset your forgotten HP password:

Step 1: Download, install Windows Password Key on an workable computer. Insert a CD/DVD or USB flash drive. Launch this software and … Read more