Kess V2 is a popular ECU (engine control unit) tuning tool used to read and write vehicle firmware via the OBD-II port or bench connections. Installing Kess V2 software on Windows 10 requires care: the software is often provided as a legacy package that expects older Windows configurations, driver signing to be disabled, and specific USB-to-OBD interface drivers. The steps below provide a thorough, practical walkthrough and troubleshooting notes to get Kess V2 running on a Windows 10 machine. Follow carefully and back up any original ECU files before attempting any read/write operations.