Are these store bought DVD's? Home made DVD'S?
If store bought, where do you live (country) where did you get the DVD's?
Commercial DVD's are created using Region settings, so a DVD can be made to
not be playable on a machine from a different corner of the world.
If homemade, it could be a media problem DVD-R vs DVD+R vs DVD-RW, or it
could be Codec related.
you could also download GOM player,
www.gomplayer.com a great free media
player that uses internal codecs (not your system ones) and see if it will
recognize and play the DVD's
"WGSLATER" <> wrote in message
news:B1551FD5-4C7D-403D-948E-...
> Occasionally I come across a DVD Video that is not recognized as even
> being
> installed in the DVD Drive. Neither Windows Explorer or Windows Media
> Center
> see the DVD. If I insert the DVD into my laptop with XP installed, it
> automatically starts and plays fine. Other DVD's play fine, so I know my
> DVD
> Drive is working. My OS is Vista Home Premium 32 bit.