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If you are using an older operating system or a legacy version of VCDS Lite for generic K-Line cables, you can extract the drivers manually:
(listed as Ross-Tech HEX-USB or Ross-Tech Interface ).
Upon reboot, press or F7 to select "Disable driver signature enforcement" .
If Windows fails to recognize the cable automatically, you can force the installation of the 03.02.07 driver files manually.