qosmio x770

greetings all, i think i need you ALL to help me out on this. my laptop is Toshiba Qosmio x770-107 that have now bios v2.1 which makes me throttle & overheat. i need a way to flash downgrade my bios to 1.10 i have the file & the afudos but it keeps saying '' write protected '' & i dont have...