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did you already have a look at your bios? i remember a friend of mine had a computer that had some setting named something like "after unexpected power off" "reboot/halt/whatever". it could be that your windows dies in the shut down process. and after that the computer reboots (ever had a bluescreen? the same will happpen then).
I too kinda think this is a bios thing with the computer set to restart on power failure and it is thinking that this is what is going on.
I JUST HAD THIS PROBLEM...
Just yesterday, I had this problem! For me it ended up being a virus. I updated my virus definitions. Stopped all internet traffic, ran a virus scan, let it run overnight.
Then, the problem was solved.
This however, could be completely unrelated...just a suggestion.
yes, i think its because the bios's date is 1906....that is the error i get when i run linux reguarding acpi.
woot? a y2k bug? i thought that was a legend(err well i have seen them in like office apps etc, but never something "critical", more just formating issues).
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