An ISO image (.iso) is an informal term for a disk image of an ISO 9660 file
system. More loosely, it refers to any optical disk image, even a UDF image.
As is typical for disk images, in addition to the data files that are
contained in the ISO image, it also contains all the filesystem metadata
(boot code, structures, and attributes). All of this information is
contained in a single file. These properties make it an attractive
alternative to physical media for the distribution of software which
requires this additional information as it is simple to retrieve over the
You need software such as Daemon Tools or Nero Drive Image or burn to a
blank DVD for it to be functional.
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"Bob Willer" <email@example.com> wrote in message
> Well, I am 0 for 2 trying to install Vista & Longhorn Server Beta 2. With
> Vista, I have now ripped 2 DVD's, both of which start copying files, and
> then fail with the message that it can't read the dvd.
> With Longhorn, I have tried installing to both Virtual PC and Virtual
> Server 2005 R2 from the .iso. Both attempts have yielded the following
> "Setup was unable to find the Windows End User License Agreement. Please
> ensure that you are running Setup from valid installation media."
> Is an .iso not valid media?
> Anyone had any luck with this scenario?
> Bob Willer
> BetaID 267513