I have two separate instances of Win8 running on two separate IDE hard drives (both Win8's restored from same exact backup image).

The one on the hard drive comected to the SATA port (via an adaptor) runs fine, but the one on the IDE connection (motherboard's only one), does not respond properly when a manual shutdown is initiated. Instead of shutting down the PC, it goes into sleep mode. This does not happen if an application (my backup software, for instance) is set to perform a shutdown after completing it's job. Only affecting manual shutdowns, but all of them.

So I am wondering if Win8 is lacking an IDE driver of some kind, and if there is a way to deternine this.

Seems strange to me that while both hard drives are IDE "underneath the hood", that the one connected throgh an adaptor is more easily being recognized by Win8, and curious if there is an easy fix.