Are you planning to use Kess 2.90 for a specific vehicle brand, or
To get the most out of Kess 2.90, follow these "golden rules":
is a Bench tool . It requires you to remove the ECU from the car and open it.
Most users recommend keeping the laptop offline while the software is running to prevent it from trying to "call home" to official servers, which can disable the tool.
Kess 2.90 remains the "gold standard" for entry-level and mid-range tuning. It strikes the perfect balance between affordability and capability. If you are looking to get into DPF/EGR deletes, stage 1 remapping, or fuel economy tuning, this software-hardware combo is arguably the best investment you can make for your garage.
The software often uses patches that antivirus programs misidentify as threats.