I have Lenovo Z580 with bios 5FCN91WW, I have somehow lost access to bios, when I select Bios setup it just loads windows. Secure boot was previously enabled so I can not boot from anything else. If I remove the HDD the screen remains blank and shows nothing. I tried using wincrisis tool and pressing diff combination to flash bios again but none worked. How can I gain access to BIOS again ?