Hi Computernerd22,

Also, I don't see where/how it can mess up your optical drive either.
That is what made me mention AACS. Apparently a HD-DVD can carry a blacklist which will prevent it being played by certain hardware. In the case of computer drives this would have to be generic, so is unlikely to be used.

This doesn't actually do anything to the drive, which would work normally and continue to play pre-blacklist HD-DVDs