notebook administration password not recognised

[Spax94]

I installed Linux Mint in dual boot with preinstalled Windows 10. To do this I had to carry out some operations which required to select an administration password. After Linux installation the system ignored Linux Mint and started directly with Windows. I searched for help in a Linux Mint Forum and I was suggested to change the Boot device options from the Windows OS boot manager to the Ubuntu OS boot manager in such a way to be able to select the OS after boot.
Therefore I  opened the Boot Option Menu, changed the selection and pressed F10. I was asked to enter my administration password . I entered the password and .... it did not work. The password was not recognised as a valid password. Is it possible to solve this problem or I have to always enter the Boot Option Menu to choose the OS?

[WAWood]

@Spax94 

I don't understand what you did to require a password.  I've installed Linux Mint easily over a dozen times, on a variety of PCs, and never once, have I been required to enter a password to perform the installation, only to create the Mint user account.

I wish we could help you, but sorry, due to recent changes in Community policy, we are no longer able to provide any assistance with password reset or recovery issues.

Also please note that now, to resolve a forgotten BIOS password issue, a system board replacement is required -- and additional customer costs apply, HP has issued this post about BIOS passwords: https://support.hp.com/us-en/document/c06368824.

In addition, according to the Community's Rules of Participation (which you can read from here: https://h30434.www3.hp.com/t5/custom/page/page-id/hp.rulespage😞

4d. No posts shall include instructions or directions intended to bypass or subvert security measures, including passwords, locking mechanisms, fingerprint scans, etc., or to bypass any safety measures.

For assistance NOW, you have to contact your regional HP Customer Support location directly as they will confirm ownership of the PC before providing any assistance -- something we are not able to do from here.

If you live in the US or Canada, contact information is on this page: http://www8.hp.com/us/en/contact-hp/phone-assist.html#section1

If you live elsewhere, contact information is on this page: http://www8.hp.com/us/en/contact-hp/ww-contact-us.html

[Spax94]

Thank you for your answer. I followed instructions found to install Linux Mint in dual boot with preinstalled Windows 10. I do not remember if to set a password was required to remove fast boot or secure boot.
However, if the system is not recognising the password it simply means that to start Mint I have to enter the boot options every time. I can consider this only a small annoyance.