My computer a PBell Viera with Vista installed

When you reinstall Windows Vista on the same computer, Windows will give you an error message.
Microsoft has implemented a "new way" to fight against software piracy, so you need to contact Microsoft, and they will guide you thru the process, as long as you are the rightfull owner of the Windows license, and your computer has not suffered from mayor component changes (hardware wise).

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You need to call Microsoft at 1-888-652-2342 or

1-888-895-4335 and explain what is happening. Just make sure you are typing the product key listed on the case exactly as it is written. It is very easy to make a mistake. You can only install Vista on your computer 5 times if you have made significant hardware changes.