This method provides access to safe mode if your computer is unable to boot and therefore going to charms, press restart while holding shift is not an option
His OP simply states to get to Advanced Boot Menu ands its does that. I get the fact a PC might not be bootable but that is not what you said in OP. It is enough for me to get to disable driver signing etc. and saves time rather than going the long way and multiple mouse clicks to do same thing.
LOL, who is the Frenchman mad at? And to answer the above, disabling driver signing works fine in 8.1 (I have not used 32bit though).