Windows 7 DVD - backup
I have just bought a 3 license install for Windows 7 home premium for my family.
Because it will be used by my children who have their own laptops i wanted to make them a copy if they need the DVD when i am not here.
Am i allowed to do this as i have a 3 license version?
If i am allowed, what is the best software to use to make the DVD backup? Preferably free.