Help to update BIOS on Aurora R4

I am trying to update my bios to support my newly acquired 780 graphics card. Currently my system is using bios version A03 and I am trying to get it to A05 so I then can make my way towards A11. I have tried to do it through windows and I get an error that says "failed to load the driver." I have tried to load it through a bootable dos flash drive and I get an error: "Problem allocating BIOS buffer." I am running windows 10 pro and have tried everything I can think of. Please help with solution. Suggestions...