I was not able to flash using Win7 home prem 64bit. Since I'm running the home version, XP mode AKA VPC XP is not available. I did try my Ubuntu VM, but had issues with the USB connection occurring at the right time.

What did work perfectly on my Win7 64bit laptop was booting via a Ubuntu live USB boot thumb drive. I had the flasher util and the bin files on a second USB drive and it worked as documented.