Uninstall VCDS and the Ross-Tech USB drivers via Windows "Apps & Features."
Open Device Manager, locate the Ross-Tech device (if plugged in), right-click it, and select "Uninstall device," making sure to check the box for "Delete the driver software for this device". vcds+loader+kolimer+failed+2+better
If the loader starts but VCDS says "Interface: Not Found" during a port test, try these hardware-focused steps: Uninstall VCDS and the Ross-Tech USB drivers via
Download the official VCDS installer but do not run it yet. and select "Uninstall device