Disable/Removal of Administrative Password from Bios in Lenovo G50 70

I know my Bios administrative/System and Hard disk password. But when I want to remove them I just cannot do so. When I boot my Laptop it asks me for Hard disk Password which I have and can easily log into my Windows 10 SL.
But When I want to enter my BIOS, it asks me two passwords - first HDD Password and after that System Password. I have both and they work as well. After Entering BIOS - under Security - I can only navigate to the following 2 options:-
1 Set User Password
2 Change User Password.

All other options like: Administrator Password, User Password, HDD Password, Set Hard Disk Password, Change Master Password cannot be navigated. My opinion is that I have limited rights when I enter my BIOS.
I have removed my hard disk and entered BIOS but this way also I could not navigate to these options.
I am attaching herewith two print screens. One print screen is when HDD was inside the Laptop and I entered BIOS.
The second Print Screen is when I removed HDD and I entered BIOS.
I have googled and tried many times to remove Admin , Master, HDD Passwords but could not do so.
I have read somewhere that flashing BIOS will overcome this problem. But I have not done flashing of Bios. Anyhelp on flashing of BIOS is most Welcome.
Please help
Ashok Kumar Bagaria

logon on to your Country's Lenovo Support Webpage and let it run the diagnostic for your model , it will/should tell you if there is a new bios or other downloads available.

Home Global Support

CountMike said:

Your Secure BOOT is enabled, maybe that has something to do with it.

Thanks. Could be but I cannot navigate to Secure Boot as well.