We have noticed from our customer machines that the licence stickers on their computer have been damaged preventing the activation of Windows as we can’t see the licence key.
These stickers can be easily damaged more so on laptops as the sticker is usually under the laptop.
Here is our advice; place some stick tape over the licence sticker but only use enough just to cover the sticker. This will ensure that the sticker remains in good condition should you need the licence key again. You can also use this method for all licence stickers produced from Microsoft.
You would think that Microsoft would put a protective covering over the sticker but let’s just think this one through from their point of view. Damaged sticker, customer has to buy another licence $$$ for Microsoft.