the above hack is not specific to windows, the same idea can be used to hack any os, including linux and osx... basically if you can control the machine before the os boots and security is in place you can do what you want, if you can control the hardware, the bios, ect you control what happens... you can hack an os by booting off a cd, dvd, thumb drive, usb drive, another drive or just taking out the disk drive and connecting to a computer you control, then changing the oses files so that you gain control and then booting the hacked os. you can even do this on an encrypted drive, just have to break the encryption first, see google. and you can hack a motherboards bios.