Password forgotten by the user at packard Bell acc?

Hello people I wanted to use my old packard bell laptop again. Unfortunately, the account with a password and I do not know that anymore. How can I do it that the password is reset? Or completely restore Pc is synonymous (of course, without coming into acc) thank you in advance

No good news for you: Unscrew the device, take apart and take out biosbatteries shortly. And back. Then it works.