Hello Win-Raid. I have a Toshiba satellite C55-A5285, and I have requested a BIOS Advanced menu unlock over at Bios-mods website, but they didn’t know how to do it properly. I purchased an SPI flash programmer, and read the bios from the chip so that it could be modded to reveal advanced menus. If it is possible, can you guys take a look at the .BIN file I will attach and unlock hidden options. I will use programmer to re-flash as it cant be flashed back with command line. Toshiba has protected range registers that prevent software flash. Thank you very much. 
Link to BIOS is here
Bump- i also have the same computer. Anyone?
Has anyone solved this yet?