Follow the prompts to complete the installation. Windows may warn you that the driver is unsigned; click . Step 4: Verify Installation
For owners of Opel and Vauxhall vehicles, the OP-COM diagnostic interface has long been a popular, budget-friendly tool for troubleshooting everything from engine fault codes to airbag systems and key programming. Among the myriad of versions available online, "Opcom 1.99" is one of the most frequently encountered—and one of the most misunderstood. While often sold as a "newest version" or "latest firmware," the reality is that V1.99 is an unofficial, cloned version of the genuine OP-COM tool, originally developed by Scan-Tech. Authentic genuine units topped out at official firmware version 1.67.
Installing OP-COM 1.99 drivers on Windows 10 is a common challenge because these "China Clone" devices typically use unsigned drivers that Windows 10 blocks by default. To get your interface working, you must manually bypass driver signature enforcement and point the system to the correct files. 1. Disable Driver Signature Enforcement
"Let me pick from a list of available drivers on my computer" opcom 1.99 drivers windows 10
Check Device Manager for "USB Serial Converter" under USB Controllers. Windows overwrote the driver
Installing OP-COM 1.99 drivers on Windows 10 is a common challenge for Opel and Vauxhall owners due to modern security features and driver signing requirements. While the 1.99 firmware is popular for diagnostic tasks, getting it to communicate with a 64-bit Windows 10 system typically requires bypassing standard driver enforcement. Before starting, ensure you have the following: The OP-COM hardware interface (firmware 1.99).
| Symptom | Likely Cause | Recommended Solution | | :--- | :--- | :--- | | Device not found in Device Manager. | Faulty USB cable, dead USB port, or hardware issue. | Try a different USB port (USB 2.0 is often more reliable than 3.0) and a known-good cable. | | Driver installation fails (Code 52). | Windows driver signature enforcement is active. | Reboot and . | | Interface test passes, but cannot connect to the car (ECU). | Incorrect, often generic, driver version (e.g., 8.30 from FTDI). | In Device Manager, right-click the device, select Update driver , and manually force it back to the 2.08.24 legacy driver. | | Vaux-Com software flashes "Not Powered from Car". | Interface not receiving 12V power from the OBD port. | Check the vehicle’s OBD fuse (often shared with the cigarette lighter). Ensure the ignition is switched on. | | "Checking interface" error persists. | Driver misconfiguration. | Open Device Manager, locate the COM port assigned to the Opcom, and in its properties, ensure "Load VCP" is unticked if the option exists. | | Software crashes on launch. | Missing or incompatible .NET Framework. | Install dotnetfx35_SP1 (Microsoft .NET Framework 3.5). The Opcom 120309a software relies on this older framework. | | No signal from ECU; green light on interface is on but car won't connect. | Poor build quality and fake components (common with 1.99 clones). | If basic troubleshooting fails, the hardware may be defective. A quick check is to see if the interface gets unusually hot; this indicates low-quality or failing components. | Follow the prompts to complete the installation
Your computer will reboot into a blue option screen. Select . Click Advanced options > Startup Settings . Click the Restart button.
Open (right-click the Start button and select it).
Select > Advanced Options > Startup Settings > Restart . Press 7 or F7 to "Disable driver signature enforcement." 2. Manual Driver Mapping Once the PC restarts in the "unsecured" mode: Connect the OPCOM device to a USB port. Among the myriad of versions available online, "Opcom 1
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Your computer will restart, and you can now install unsigned drivers. Step 2: Plug in the OP-COM Device Plug the USB end of the OP-COM device into your computer. connect it to the car yet. Step 3: Install the Drivers via Device Manager Right-click the Start Button and select Device Manager .