Hi! I searched about this question i haven't found any answer. I've a HP Compaq 6710b with BIOS F.20 (01/12/2011): "ftp://ftp.hp.com/pub/softpaq/sp55501-56000/sp55553.exe" and I can't downgrade to F.16. I tried with "HPQFlash_220.127.116.11_patched" in Windows and patched "Rompaq.exe" in DOS and always said that can't be downgraded. Can anyone help me, modifying this lastest BIOS or tell me how to downgrade? Cheers!