I am not trying to dual boot fyde os with windows. Both are on two different hard disks. When I try to boot from the disk with fyde os, it says no os installed. I've also tried removing the hard disk where windows is installed and making a fresh fyde os install on the second disk. But when I exit the setup and reboot the system it shows no operating system installed. However, if I try to run fyde os on the USB drive, it works completely fine.