And I forgot the BIOS password for my laptop, furthermore I got a laptop for free, which is why I have no proof of purchase. Can someone help me to reset the password?
Then what would be the difference if the device was stolen?
I can't help that I got this as a gift I can't do anything that I do not have a proof of purchase that you can get a receipt for every gift 🤷
I think you got that as a gift. But if you publish instructions for cracking laptops here, everyone who stole them will rub their hands and say thank you. And everyone who had their laptops stolen shows me a bird.
Yes it can be good but now I have a laptop that doesn't bring me anything because I forgot the password
That is the meaning of a password. It is created to prevent access to the computer. Not remembering an important password and not writing it down in a safe place is like throwing your wallet into the next river. Sorry. I'm sorry for you.
Tell me, do you know internet search engines such as Google? If, for example, Looking for "Lenovo L520 BIOS password reset", you would find solutions if they exist. Then there are pages like: https://www.cocosenor.com/articles/computer/3-ways-to-unlock-bios-password-on-lenovo-thinkpad-laptop.html
Yes, I know Google and I have already tried to find something out there
And the 3 methods that appear in the first link suggested by Google didn't help you?
All three were useless none worked
If short circuiting the TPM chip didn't help, it is obviously a Lenovo L520 Thinkpad that differs from all others. Are you sure it's about the BIOS password? Maybe it is the password from the hard drive, BitLocker, VeraCrypt or it belongs to the operating system?
As far as I know, Lenovo support only uses these 3 methods, but there's still the trick with the master password. For this, the serial number of the device is also checked and compared with the list of devices reported as stolen - so you do not need a proof of purchase. So get in touch with Lenovo support.
Yes, I know Google and I have already tried to find something out there
That always amazes me. Actually, all possible steps on the first 5 pages that Google suggests are described simply and clearly. If you have already tried it, it makes sense to mention it explicitly so that people who voluntarily try to help you in their free time do not waste their and their time.
