well first its impossible for a machine not to POST, second even though
i don't know, i can still tell you that no MS didn't pursuade anyone to
block an installation from another OS ...
third, your just going to have to find out what key it is, that it would be
to access your BIOS .. maybe just go to the manufactuer site, contact
their tech support,manuals, etc ...
i know compaqs have funky ways of accessing the BIOS, and its not
simply just DEL, sometimes its upwards to 3 key presses to access it.