Using windows 7 product key from old laptop

I've recently built a pc - windows 10 but not activated. I have an old laptop that I don't use anymore. Could I just use the product key from there to activate windows 10? The product key is on a sticker on the back side of the laptop. Or would I have to remove windows 7 from that old laptop first?
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More about windows product key laptop
  1. Best answer
    The license key on the Laptop is tied to that Laptop's motherboard , time to purchase a new license.
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