Enabling USB keyboard

I've got a Asus K8N motherboard with a USB keyboard.  The BIOS offers no USB options except for turning USB on or off.  Now the keyboard only functions when Windows XP has booted, and loaded the drivers.  Thing is, it works after moving the keyboard to another USB slot, Windows doesn't see it before that.  Help?

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Your mainboard is probably old as fuck and doesn't (fully) support USB keyboards. Maybe a BIOS update helps. If not, tough luck.

Make sure you follow the bios update directions EXACTLY as they are written. If it runs in windows, turn off every other program you can, including AntiVirus.