Removing a Bios Password is a very simple . While Starting pc and when we tried to enter into system's bios setting its asking for PASSWORD that you doesn't know . its look like that :-
Now to remove bios password Switch off your computer .Remove this Bios cell and turn computer on and enter into bios and you will see that bios is not asking for password after that install bios cell again and try to enter into bios again and it will not ask for any password ,save your Date and time setting , Boot Setting and other setting there and save it before you close.
If ther is any problem with that you can ask it into comments