Magrathean
worldbuilder
You never had to format your PC? To format the C drive on a Windows computer, you get on DOS and write Format C. I wouldn't know what the "for cortex" means, but continuing with the Windows drive formatting i'd say it's a way to say that you're getting to the core/cortex (i know they're not the same, but hell) of the computer, or maybe of a person's mind. Hell, i don't know, let me overanalyze that song and i'll come up with something.