I think you will have to contact Gateway to resolve this issue. I know I've heard of that error being returned if there wasn't RAM in the first slot of the system, but given your description of the problem that doesn't seem to be the case here.
If you're already in the BIOS and you're not interested in using vPro, you can look to see if there is an option to disable vPro (it might be listed as AMT) in the BIOS. This implementation is specific to the different OEM vendors (like Gateway), that's one of the reasons I mentioned following up with them.
