The BIOS is current.
When I downloaded the driver pack, the USB 3.0 Driver folder only had a readme in it indicating that "No drivers are necessary for Windows 8 as they are built into the operating system"
I am putting the system to sleep and it wakes up by itself.
It comes back on when in sleep.
The LAN port is connected to a router, but wake on lan is turned off.
I see this behavior without any keyboard plugged in at all.
I have followed the instructions from microsoft. Most of which involve turning off devices' ability to wake the computer. I have disabled all devices that you can disable.