Using an unlicensed version of Windows can lead to limitations such as restricted features, lack of personalization options, and withheld critical updates. A legitimate Windows 11 license can be purchased from platforms like WDKeys, with prices for Windows 11 Home starting under eight dollars. This license provides access to the full Windows experience, including features like dark mode, customizable wallpapers, and consistent updates. Support for Windows 10 will end in October 2025, and purchasing a Windows key now allows for a free upgrade to Windows 11 if hardware requirements are met. WDKeys offers both Windows 11 Home and Pro at lower prices than Microsoft, and their OEM keys are linked to a single machine for reinstallation. Support is available through email or live chat.