The Lenovo Device Extension (LDE) is a Windows driver or software package developed by Lenovo. It is primarily used to enhance the functionality of certain Lenovo devices and improve their compatibility with various hardware and software features. This extension often includes device management tools, system diagnostics, or specific device optimizations to ensure better performance or reliability.

The Lenovo Device Extension can be part of a variety of Lenovo system utilities, such as the Lenovo Vantage app or the Lenovo System Interface Foundation, which are designed to manage and update Lenovo drivers, firmware, and settings.