I want to dual boot win 10 on one ssd with win 7 on a seperate hdd. I tried changing the boot order in bios, but that didn’t work. I have an hp z220 with a gtx 1060 6gb, 16 gb of ddr3 ram, and an i7-3770. I want to know if there is a program that would allow me to select what drive to boot into, preferably free. I also didn’t have the win 7 hdd plugged in while installing win 10 on ssd.