Is an update to Intel ME available from Dell?
I don't know that it actually should flash from DOS. Most of Dell's BIOS updates say they can be run from a floppy disk, even for this brand-spanking new Win8 laptop. It's just boilerplate text on their support site. I've been nagging them to get the site into the 21st century, seemingly forever.
Not sure where I'd shove a floppy disk into this lappy, but the site insists the flash can be run from a DOS disk. Reality is this system can't be booted from the internal DVD drive or from USB, but I digress...
Is there any specific reason you need to update BIOS? Does the update fix a problem you actually have? If not, ignore the update.
If it's still under warranty, maybe you should contact Dell tech support. The only response to my behind the scenes query came from an experienced forum regular and not directly from anyone at Dell, even though I asked the question twice. But I like to nag them so I'll ask a third time... 