Voipgol

Trying to install Windows 7 Ultimate x64 on an ASUS M5A97 mobo with AMD SB850 RAID, two WD 750GB drives configured as RAID 0. No drives are recognized by W7 install, so I choose Load Drivers. I put the drivers on a USB stick. Install finds the drivers there, starts loading them, then comes back with 'Installing an unsigned 64 bit driver is not supported and may result in an unstable Windows installation.' Round and round she goes. I downloaded the latest drivers from ASUS website. I'm willing to take the chance on loading an unsigned driver Bill Gates! I saw other posts on here that recommend clicking Repair instead of Install, but I don't see where that option is. All I am given as options is Upgrade or Install. Choosing upgrade tells me to boot Windows first. But this is a brand new install so... I see this problem has been ongoing for at least the last 18 months; surely someone has a solution that actually works?
ETA: I just found the disk for Windows 7 Ultimate x64 with Service Pack 1. I was hoping this obvious Microsoft issue might have been fixed but (drum roll please) - NO!!! BTW the ASUS drivers are WHQL...