good day, i have an old pc but its motherboard does not support usb booting and it doesn't have a dvd-rom. i would like to install windows 7 on its hard drive using another computer. i am currenty running windows 10 installed on the pc that i plan on using to install windows 7 on the other hard drive. is there a way i will be able to install windows 7 on the secondary hard drive without using flash drives because i don't have any at the moment?