If you bought a PC that came with Windows but you can't find the key, it’s likely embedded in your hardware (BIOS/UEFI). You can find it for free using a simple command:
These keys allow the software to install , but they will not activate it for permanent use. 5. Recovering Your Own "Lost" Key windows-10-product-keys-free
You’ll see a faint "Activate Windows" watermark in the corner and won’t be able to change personalization settings like your wallpaper or taskbar color. 2. Reuse Your Old Windows 7 or 8.1 Keys If you bought a PC that came with