dvd microsoft not loading why

Just got the DVD directly in the mail from microsoft. I want to install vista.
On my home built machine with an asrock 939MB and a a opteron 939 I got this message
This disc contains a "UDF" file system and requires an operating system that supports the ISO-13346 "UDF" file system specification.
Tried it on my dell and it autoladed without a problem. Can't figure out what this message means. Please help with this one.

Are you trying to perform an update from Win XP by running the setup program? If so, that's why you get the error. The DVD is formatted in UDF. That's the standard for DVDs and Win XP does not have native support for UDF.
Boot from the DVD and you won't get that error. But you're advised to install Vista on a separate partition or hard drive. You may encounter problems with your Win XP, especially if you install to a partition on the same hard drive as XP. The safest thing to do is to disable you Win XP hard drive when you install Vista and put Vista on a separate hard drive. If you "update" XP, make sure you have a full back of your Win XP system that you can use to restore your XP to the state it was. You will have to completely clean the hard drive to replace Vista!
sseligson wrote:

Just got the DVD directly in the mail from microsoft. I want to install vista.
On my home built machine with an asrock 939MB and a a opteron 939 I got this message
This disc contains a "UDF" file system and requires an operating system that supports the ISO-13346 "UDF" file system specification.
Tried it on my dell and it autoladed without a problem. Can't figure out what this message means. Please help with this one.