A Lexia 3 VCI (Vehicle Communication Interface) with a "full chip" configuration is preferred for reliable communication with 7.8x versions.

While version 7.57 is widely considered the most stable "baseline" for older PSA vehicles, upgrading to 7.82 is essential if you need to work on vehicles produced between . It maintains the core Lexia 3 (Citroën) and PP2000 (Peugeot) functionalities while expanding compatibility for newer models. Step-by-Step Installation Guide (7.76 to 7.82)

You must run the update files as an Administrator on Windows 7 and above. 2. Running the 7.76 to 7.82 Update Lexia? Diagbox? - French Car Forum

Updating your software from version 7.76 to 7.82 is a critical step for owners of Peugeot and Citroën vehicles manufactured up to late 2015. This specific update, often associated with the transition to version 8.18 architecture, provides the necessary driver support and vehicle databases to diagnose newer ECUs and systems. Why Update to Diagbox 7.82?

Windows 7 (32-bit) is highly recommended for maximum stability, though XP and Windows 8 (32-bit) are also compatible.