If your cable is "bricked" (frequently indicated by a "Failed to Start" or "Interface Not Found" error despite driver updates), you may need to using an external programmer. For many users, it is often more cost-effective to replace the cable or invest in a genuine Ross-Tech interface to avoid future software conflicts. If you'd like, I can help you: Find the exact driver version you need
The loader, often packaged with dubious interfaces from Chinese marketplaces (eBay, AliExpress), is designed to bypass the software’s anti-piracy checks. But users frequently encounter a dead-end message:
If you are already getting “failed 2 top,” the loader is not working correctly. No public fix is guaranteed because the patch is unofficial and not supported.
before running the test, as many status errors are caused by lack of power from the vehicle.
Reinstall 32-bit version or match loader version to software.
If you are still stuck, consider buying a genuine Ross-Tech HEX-V2 cable ($199). It comes with lifetime software updates and never crashes with "Failed 2 Top." For hobbyists who can't afford it, the Kolimer loader remains a viable option — provided you treat your PC like a diagnostic machine (no internet, AV disabled, old Windows build).
Go to and uninstall any "Ross-Tech" or "USB Serial Port" devices. Run the DPInst64.exe found in the VCDS installation folder.