On new system where windows 8.1 installed already, I have shrieked the partition and tried to install RHEL 6. But the DVD is not detectable (may be because it is not supporting UEFI boot source).
So I have disabled the "Boot Security" option from BIOS and installed RHEL using "Legacy boot source". But the problem is windows 8.1 is NOT get detected when I choose to boot from "Legacy Boot Source". And when I choose "UEFI Boot Source", then only windows 8.1 is detectable.
Now there is only way to switch between OS is to use "Boot Option" (press F9) every time which does NOT seem a good idea. Is there any other way?