The serial number for Windows 8 will come built into the BIOS

For years, laptops have been sold to a licensed version of windows included, which is added to the price paid by the consumer and allows you to use the computer as soon as when you get home. Generally, the license and the corresponding serial number is on a sticker or sticker pasted on the bottom of the device, leaving visible when the model is on display.
And although he spends little, there are times when the same PC that was on show then sold, and if some curious looked license number and stole it, can be a problem. To fix this, Microsoft has included a new feature in Windows 8, which stores the number in the internal memory of the bios on the motherboard, not visible from the outside of the notebook casing.
So, when we installed Windows 8 on a device that holds a license and serial number in the BIOS, the will automatically without user intervention, making it easier and faster installation process.
Link: BIOS uses embedded Windows 8 product key (Slashgear)
Tags: bios, license, Microsoft, serial number, series, windows, Windows 8

