Yep, "Oh, they installed Windows at the factory. Why would anyone need to keep those disks around?"
It's like my friend, a bass guitar player, once said (jokingly) .... I asked him what he uses as a tuner when he tunes his bass, and he said, "Oh no, this isn't a regular guitar, it's a bass. They come pre-tuned from the factory!" :)
You buy a new dishwasher, a new camera, a new computer. Why on earth would you throw out any instructions, discs, documentation it comes with? You can’t tell when you might need to refer to it in the future. But people chuck them all the time.