Like TigerZai said, the main benefit of a virtual cd drive is to use apps like games, dictionaries, learning, even movies, not from disc - CD or DVD - but from hdd. This lets you limit damages to the respective media, and enhances app performance, since the data is already on yr hdd. Personally, I prefer to use Virtual CD-drive from MS Downloads; it's tiny and standalone, nu install necessary, and works like a dream.