My computer:
Laptop actually. It is rebuild time, but my external floppy drive died some time ago, but that's cool, I've got a CD recovery disk. So I dig out the PCMCIA card, and boot it all up, and it's not bootable, it seems. The book says boot the PC from a floppy, and then go to the CD. Except they didn't give me a floppy back in 1999. So I check the Sony Vaio site on my main machine (which must have supra-powered cookies, because it knew everything about me), and it says the CD is bootable. So I figure that's buggered, too.
So now I'm down one great sub-notebook that fit in my handbook, and a lovely wireless network. Bugger.