Select the .inf file (usually ftdibus.inf ) and ignore the Windows security warning to proceed. Troubleshooting Common Failures Probable Cause Resolution Incorrect COM port or driver mismatch

Clone drivers lack a digital signature verified by Microsoft.

A status window should pop up showing: along with firmware version V01.99 . Troubleshooting Common OP-COM 1.99 Errors

Target the exact same driver folder on your Desktop used in Step 4. Click and accept the unverified driver warning.

Right-click your OP-COM or Vaux-Com executable application file (e.g., VAUXCOM.exe ) and select .

This article provides the definitive roadmap. You will learn not only how to install the drivers but also how to bypass Microsoft’s driver signature enforcement, configure your COM ports, and get your OP-COM 1.99 unit working reliably on Windows 10 (32-bit and 64-bit).

The you see when running the interface test If your Windows 10 is 64-bit or 32-bit What car model and year you are trying to diagnose

Before proceeding to driver installation, prepare your hardware setup:

Disable driver signature enforcement temporarily (only if Windows blocks driver installation)

: Version 1.99 is typically a modified clone chip. Never use the "Flash Firmware" or update feature within the software, as this will permanently corrupt (brick) the clone chip inside the cable. Only use the software version that came bundled with your device. The Driver Disappears After Restarting the PC

The Opcom 1.99 is a diagnostic tool for reading and clearing codes, monitoring live data, and performing simple output tests. It is a safe tool for advanced programming functions, such as flashing new firmware to an ECU, performing complex immobilizer coding, or changing variant coding.

Disclaimer: OPCOM devices and software are frequently cloned. The 1.99 version requires stable drivers to avoid damaging the interface firmware.