New XBox One user. Bought it primarily for my grandkids, although I freely admit some interest on my part. So my learning curve is very steep and I have no doubt I'm going to be seeking information that is probably very basic and common knowledge for the "younger" users. Don't laugh to hard! I bought an Xbox One for my three young grandkids and one for our place - or rather for me! So my first question, with others to follow I'm certain, concerns programs loaded from CD games I've purchased. Examples are NASCAR Heat 4, NHL 20, and TSW (Train Sim World), and others. After the programs were loaded they all required me to insert the original installation disk to run the program. Is this normal? If normal, how are programs that are purchased, downloaded and installed from the internet on the XBox started without a CD? In advance, thanks.