All are DVDs and do require all the drives and more to support boot from DVD.
Not all drives can do this.
Try a Windows 7 DVD and not a copy or make a copy of your DVD from Microsoft but let's stop here.
Most folk can't install Windows at all. Tell the full story please.
Hello, I have an HP mini 311-1000CA with an external CD/DVD reader (or whatever it's called) , I put the windows 7 installation CD into it.