So I have a 2.5" SATA HDD that I want to make the bootable drive of my Dell OptiPlex 9010. Currently I'm using a 3.5" SATA HDD with Win10, and had both drive hooked up while I managed to install Win7 Home to the 2.5 (it'll be Win10 later), and so when I reboot it gives me the option to boot up...