Just a few weeks ago, Asus released a new USB Flashback Utility for people who upgraded their BIOS to the new EUFI .cap extension BIOS for full Windows 8 support.
Many people have had difficulty with the .cap BIOS, and are looking for a way to reverse it.
Here... ASUS - Motherboards- ASUS Rampage IV Extreme
HAF 932 Advanced / Corsair AX1200 / Asus Rampage IV Extreme / i7-3930K / H100 Cooling 4x120mm
16GB Corsair DDR3 / GTX 580x2 SLI + GTX 460 PhysX / SSDs Mushkin 240GB, Crucial 256GB, Crucial 512GB