Save $50 and don't call tech support when a BIOS update fails. My brother-in-laws relatively new Toshiba Satellite P755 froze during an automatic Toshiba update that was attempting to flash the BIOS. This rendered it incapable of booting, frustrated my prior knowledge experience on such an issue. I tried all the different Windows repair options and Safe-Mode boots, but to no avail. Then wanting to re-flash the BIOS myself with a downloaded update I was incapable of telling it to boot form CD, and inebriated off Turkey I defaulted to calling in a Warranty repair.
Well $50 later a hard to understand "tech support" person told us to pull the battery and power cord and hold the power button to clear the CMOS (which I had previously done). Then plug it back in, and hold the F2 key when powering it back on, and continue to hold F2 until the BIOS utility comes up (This was the thing the Googles never came back to tell me. So remember it well. I've not found whether this is a Toshiba hardware trick, or if it works with others too, likely by using their respective BIOS keys). Then reset to Default settings and save, then allow Windows to run a boot repair and then a system restore to last know good settings.
