If Vista came preinstalled on your Computer, it is classified as an OEM licence, and is non-transferable.
The OEM Vista Licence is tied to the original Computer it is installed on, and dies with the Computer.
You can NOT transfer it to another Computer/Laptop
If a Retail Vista Licence, you may transfer it to another Computer/Laptop.
But, it may only be installed on one Computer at a time.
One Licence = One Installation.
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