If you already own Windows 10, you can upgrade to Windows 11 for free with a PC system update. But if you are currently in the process or planning on building a PC, you'll likely need to purchase a license. StackSocial is currently offering a Windows 11 Pro license deal that will get you Microsoft's latest operating system for super cheap. License keys are discounted to $15 at StackSocial, but if you enter promo code UPGRADE at checkout, you'll get a Windows 11 Pro license for only $10. StackSocial also has Windows 11 Home for $15, though the promo code only works with the Pro license.If you purchased Windows 11 Pro or Home directly from Microsoft, you'd pay $200 or $139, respectively. Get deal at StackSocial Continue Reading at GameSpot