Did you unplug all USB connections and re-test?
I haven't turned my computer on in a few days and I finally get time to come sit down at my desk and I run into an issue. My pc won't boot up completely. I'm met with this prompt, shown in the photo, and then my pc shuts down 15 seconds later due to the USB overload. Any suggestions? I'm using 3 USBs, for the mouse/keyboard, headset, and wireless adaptor card.
Link for photo: http://tinypic.com/view.php?pic=21k9pbq&s=9#.WMnFYjz3aEc

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic