Raymond Chen has let slip that Windows Vista will be somewhat choosey with regards to which DVD drives it supports. Chen, who has worked on Windows development since joining Microsoft in 1992 and specializes in backwards compatibility issues, has warned that older DVD drives will not function fully in Windows Vista.
Chances are if you shell out $300 for a new Windows, then you already have a newer DVD-Rom and likely a writer. Even so, we have come to expect Windows to support whatever ‘normal’ hardware we throw at it, so this is somewhat of a blow. Source: Ars Technica.