Click “Start”, on “Computer” click right mouse button and select “Properties”, click “Device Manager”
Find the item labeled “IEEE 1394 Bus Host Controllers” and expand this group.
This group only contains one device: “VIA 1394 OHCI Compliant Host Controller”
Right click this item and select “Properties”, select “Power Management” tab, and finally check the “Allow the computer to turn off this device to save power”.
After that the computer should power down normally. If you can't find it in device manager email me..........there are about a gagillion things to check for but I have confidence you'll find it.