Before diving into the technical setup, it’s important to understand why version 1.99 remains a holy grail for many. Unlike newer firmware versions that sometimes restrict access to specific control modules, 1.99 is widely regarded in the community as the last "fully unlocked" stable version for many older interfaces. It offers comprehensive coverage for Vauxhall/Opel models up to around 2013/2014.

For users owning the older, purple or black PCB interface clones, 1.99 is often the ceiling of what their hardware can support. Running it on Windows 10 offers the allure of faster processing and better laptop battery life compared to the aging Windows XP machines these tools were originally designed for.

If you lost the CD:


Here is the text content regarding Opcom 1.99 drivers for Windows 10.


Windows 10 requires digitally signed drivers by default. You must disable this to install Opcom drivers.

Some users have success replacing the FTDI driver with a generic WinUSB driver using Zadig:

Note: This method breaks many OP-COM software versions that expect a pure COM port. Use only as a last resort.


Drivers alone won’t help without OPCOM software.