The loader acts as a wrapper for the official vcds.exe . Because official software checks for an encrypted chip inside a genuine cable, the loader "tricks" the software into recognizing a third-party cable (often based on or STM32F4 chips) as a licensed interface. Hardware Compatibility
Clone cables combined with the 21.9 loader often fail on: vcds 21.9 loader
: Typically, you install the official VCDS 21.9 software first, then place the VCDSLoader.exe into the installation directory. You must then launch the program via the loader rather than the standard VCDS shortcut. The loader acts as a wrapper for the official vcds