Actually no, not XP. If XP decides it has standard support for the hdd it won't even try to load a driver, during the 1st stage of sysloading, and after it disables BIOS support it finds out it cannot access the hdd anymore, gets flabbergasted and throws a BSOD (which, in unix lingo is "kernel panic", that describes much better how the OS actually feels on finding it has an ACME-built driver).