I had Win8/Win7 dual booting fine without secure boot. Now that you have doen the easy install, why don't you try doing a few different uefi supporing PC rebuilds using Win8. I personally found there to be paltry references to such installs on the Internet. I also experienced many technical roadblocks. It is not a straight forward process. Even current video cards can defeat sucessfull Win8 secure boot installs.