I've given this a try on a neighbour's Acer TravelMate laptop, as I tried getting into the BIOS to change the boot order only to find that the BIOS setup was password protected. :doh:
The owner did not set it, but with a sticker on it saying "Provided by xxx solutions. Please call (phone #) or bring to (address) for support.", the store she bought it had the cheek to lock the BIOS. The Phoenix generic brute-force worked, which used the code from the "System Disabled" message to generate the password. Sure enough, once I got in, I saw that the "Press F12 boot menu" option was set to "Disabled" and the boot priority was set to HDD first.