hey guys....
i have a ques. i actually hav decided to get myself a laptop with win vista preloaded. but i was told that the installation disc of win vista wont accompany the laptop

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since i want to partition my laptop as soon as i receive it according to my convenience, so i wanted to know HOW CAN I MAKE A BACKUP DISC of my os so that i can install i after repartitioning my hdd

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Is there any other way... like if i note down the product id of my copy of win vista, can i install it with any other disc of vista??
Awaiting replies!