Ubuntu Installation :: Natty Somehow Interferring With CMOS POST/ Error Persisting Past Reboot?

Basically my problem can be neatly summed up as the problem described at both here and here. I can only presume it's a rather uncommon problem to do with a particular hardware setup since I can't find any widespread bug reports of it, but it is (on my system at least) highly replicable. I can reboot my system from Natty and it either one of two scenarios. It can reboot the system (as first asked) then reboot again in the middle of POST and splurge an error about interrupting POST at me (and keep giving me this error every reboot till I go into the bios and resave some settings).

Alternatively, it can get all the way into grub, where I can dual boot into Windows, windows will get some arbritary point in (usually the login screen give or take 10 seconds) and then reboot at random. It's not even a windows crash since I've disabled auto-reboot.I'm not sure what's causing it but I can only presume it's something at the kernel level, since I'm not sure anything else would have the kind of power needed to interfere with the system at an 'outside the OS' level. As such I wouldn't have any idea how to go about fixing it, but I can hope that someone here may be able to point me in the direction of potential settings I can change (probably BIOS I guess) that might aleviate the issue till a fix is found.