I can't enter bios with F2 or change boot order with F12. It always prompt for a supervisor password that I never set.
The only thing I can do is to hit F11 to enter bios with limited functions where I can't modify anything.
The notebook was brand new and it is working well with W8.1. The problem arose when I tried to boot from a backup dvd to restore the system.
How can I get rid of this problem?
Thanks for any help