MISSING DVD DECODER

> Dear Fellow XP Users:
>
> I need help with the following question. My (computer)
> life has not been the same since the onset of the Blaster
> Worm Virus. My laptop (Toshiba) currently utilizes the
> Windows XP Professional version operating system.
>
> Prior to the updated program, I was using Windows 98 and
> had the capability to view DVD's. However, now with the
> Windows XP version, I have a video software system
> entitled Interactual. Where I could play DVD's before,
> now with this new system I can't. I repeatedly received
> an Error Message stating that no device decoder could be
> found and that it was not installed on my computer. Well
> that seems sort of strange since I had the ability to
> play DVD's prior to the upgrade to Windows XP. What
> happened?
>
> Secondly and in order to try and rectify the problem, I
> tried to download a trial edition of CinePlayer and when
> I tried to use that software, I received the
> message "Cineplayer Authentication failed". I have been
> working on this problem for a week.
>
> Does this all mean that I have to purchase a decoder kit
> to allow my DVD's to work again? Why should I have to
> now purchase a decoder kit when the DVD's used to work
> under the old operating system???
>
> Pam