If Windows fails to automatically detect the hardware, use the Device Manager to force the installation. Press and select Device Manager .
When Windows displays an exclamation mark next to a "COM LPT" device, it means the operating system detects the physical or virtual connection but cannot communicate with the hardware because the matching driver layer is missing or corrupt. Common Reasons for the Driver Error
Visit the ASIX support portal for MCS-based chipsets. com lpt 17-11 driver download
Even if you find a driver labeled "COM LPT 17-11", modern Windows may block it due to driver signature enforcement. Follow these steps:
: For those using USB-to-Serial or USB-to-Parallel cables, the "driver" is often built into Windows or provided by the cable manufacturer (e.g., Prolific or FTDI). Installation and Configuration on Windows 11 If Windows fails to automatically detect the hardware,
Without the correct driver, Windows might not detect the card, or it will label it as an "Unknown Device" in the Device Manager. Key Features of the Driver:
Click .
Download a free tool like or Unknown Device Identifier . They will reveal the actual chip manufacturer. Common suspects: