I can't revert back before f20. Not really a problem but am I stuck from going any further? After extracting the files from the f22d download I get a message that says "unsupported 16-bit application" from autoexec. Efiflash is the zip file application in with the autooexec file. After both are extracted the Efiflash gives me the notification that this version is not compatible with your system and you need to download a 64-bit version. That was the 64-bit version. Not only that, thhere are two more recent bios versions, F22f and F22j that both give the same error---WHAT AM I MISSING?