If it's an OEM disc there should be a number for you to call when you try to activate your product, and the computer should have a bank of numbers to read out to the person who deals with your call. You tell him the numbers and he in turn then gives a bank of numbers to punch back into your computer.
Or if you are in a situation like I am (not being able to talk) you can ask Microsoft UK for another Product Key. I got a new one for my XP Pro, and now that I've gone onto Vista Ultimate Microsoft have provided with a special key for my DVD Vista disc that doesn't require activation of my product ever. And I've noticed that my updates do not include Windows Genuine Advantage, so as you can see Microsoft UK are very helpful.
Their contact address is [email protected]om or at least it was for my XP Pro, I hope that this helps.
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