That is a Disable Code but we're not permitted to provide Disable Code bypasses anymore.
Passwords simply can NOT be recovered; instead, they have to be reset.
If your PC reset your password on you, we can not help in that because we have no access to either the original or the new password.
We are not permitted to assist in resetting passwords because HP considers that a violation of customer privacy. HP can assist in resetting passwords but if your original warranty has expired, they will charge you for the assistance.
If you are not prepared to spend the money to get HP to replace the motherboard, you would have to take the PC to a local repair facility to see if they can do it for you -- we can not assist in that in any way.
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