I have recently bought Windows 10 for my new PC and I do not have an optical drive. I am not sure how to put it onto a USB drive so I can install it from that. I've looked all over but I can't find a solid way to do it. I also only have a iMac as another computer so I'm not sure if it will affect how to put windows 10 onto the USB drive. If it is needed I could use a friends PC.