Scroll down to Exclusions and click .

An improper installation is a common cause of failure. Follow this exact process to ensure a clean slate.

Download a trusted version of a hardware flash repair kit (e.g., via specialized diagnostic networks like MHH Auto forums or direct vendor archives). Launch the EEPROM tool with your cable plugged in.

The Kolimer loader must match the specific firmware version on your cable's chip (e.g., ATmega162 or STM32). If you updated the VCDS software without using the loader, it may have "deactivated" or bricked the cable's license. Clean Reinstall:

: The most frequent cause of "Failed 2" is your security software quarantining or blocking the VIIPlusLoader.exe or VCDSLoader.exe file.

To narrow down the exact cause of your error, could you tell me you are currently trying to run, and whether Windows Defender recently generated an alert notice?

Plug the cable into the vehicle’s OBD-II port. Some clone cables require the 12V power supply from the car's diagnostic port to fully power up the internal EEPROM chip for the loader to read it. Best Practices for Using VCDS Loaders

Plug the diagnostic cable into your computer's USB port (you do not need to plug it into the car for the EEPROM flash).

Scroll down to and click Add or remove exclusions .

Do not mix versions. You need a matched pair.

Right-click the device and select . Be sure to check the box for "Delete the driver software for this device" .

Understanding why this error happens and how to systematically fix it will get your automotive diagnostics back up and running quickly. Understanding the Root Causes

Ensure you are using or later. Older versions frequently encounter "Failed 2" errors on modern Windows builds. Fix Windows HID Drivers Open Device Manager .