Did you enter into the BIOS and set "OS select" to "Other" and "CSM" to "Enabled" ? / it seems, we see here the name of the OA3 OEM table :
SecureBoot is diabled by default right now and i unlock the “os select” option by amibcp CSM enables when uefi boot is enabled but when i select the “os” to “other” (not windows8)the uefi boot turns disable automated so i cannot select both of them at the same time by the way the fastboot is turned on if i use os=windows8 and csm=enable combine, the OEM(TABLE)ID error show the same as last post.