A: Officially, no. Ross-Tech never signed the 409.1 drivers because the cable was discontinued before Microsoft’s policy changed. Some community members have signed the CH340 driver, but not the FTDI clone drivers.
. If your PC assigns a higher number (e.g., COM15), you must change it in Device Manager > Properties > Port Settings > Advanced Disable Driver Signature Enforcement:
The cable typically features:
: Once installed, the VAG KKL 409.1 should allow you to use software like VCDS (VAG-Com Diagnostic System) to diagnose issues with your Volkswagen, Audi, Seat, or Skoda vehicle.
Change the "COM Port Number" to an unused port between 1 and 4. Administrative Permissions