Hello atlantageezer,
Thank you for visiting the Microsoft Windows Vista Community site.
Try following the step in this article:
ACPI is the power management facility for your Windows Operating system. If this is failing you may have to run a system recovery on your computer. You can do this with the hidden partition on your hard drive, however this will erase all of the data on your machine. If this doesn't solve the problem, you may have to consider getting your hard drive checked for bad sectors as this may have failed.
This should resolve your problem.
Let us know if these steps resolve your problem. I hope the information is useful.
Regards,
Anthony
Microsoft Answers Support Engineer
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