Solution 1: Login HP laptop from other accounts with administrator rights
If you know other accounts which have admin privilege, you can use them to login your PC and reset the lost password. Take HP Windows XP Laptop Recovery as example:
A. Boot your PC from Safe Mode by pressing F8 when PC stars.
B. Login the accessible account with administrator privileges.
C. Start – Local Users and Groups – lusrmgr.msc in the Search box – ENTER.
D. Local Users and Groups – choose Users.
E. Right click the account needed to reset password, and then select Set Password.
F. Input and confirm the new password.
Solution 2: HP password bypass by free Ophcrack
Read whole article from ->>How to Reset HP Password?