Windows 10 Best — Nuvoton Communications Port Driver

The defining feature of Windows 10, compared to its predecessors, is its strict enforcement of driver signatures. A "best" driver must pass this test. Nuvoton’s official drivers, available from the nuvoton.com product page or via the Microsoft Update Catalog, are WHQL (Windows Hardware Quality Labs) certified. This certification is non-negotiable for mission-critical systems. An uncertified driver may work temporarily after disabling Secure Boot, but this exposes the system to rootkits and kernel-mode exploits. Therefore, the best driver is unequivocally the WHQL-signed version distributed either by Windows Update (when the device is connected and Windows detects Nuvoton hardware) or downloaded directly from Nuvoton’s official resources.

Run the installer as Administrator.

Restart your computer.

Open Device Manager → Expand "Ports (COM & LPT)" → You should see "Nuvoton Communications Port (COMx)".

Nuvoton does not typically provide drivers directly to consumers; they supply the hardware to motherboard manufacturers. Therefore, the "best" driver is the one specifically designed for your motherboard model. nuvoton communications port driver windows 10 best

Visit the Manufacturer’s Website:

Nuvoton provides reference drivers for their chips at www.nuvoton.com. Navigate to Products → Super I/O → PC Super I/O → select your chip family (e.g., NCT6xx series). However, these are generic and may lack motherboard-specific enhancements. The defining feature of Windows 10, compared to

Even with the "best" driver, issues can arise. Here is your troubleshooting cheat sheet. Run the installer as Administrator

After surveying countless forum threads (from EEWeb to the official Nuvoton forum) and testing across multiple Windows 10 builds (Pro, Enterprise, and LTSC), a consensus emerges. The most stable driver for the majority of Nuvoton USB-to-UART bridge chips is version 2.14.0.0 or the equivalent NuMicro VCOM driver package released in late 2019. This version is praised for its reliable enumeration—meaning the COM port appears consistently after reboot or sleep, a common failure point for older 1.x drivers. It supports baud rates up to 3 Mbps and properly implements the DTR (Data Terminal Ready) and RTS (Request to Send) flow control lines, which are essential for programming microcontrollers.

Conversely, newer experimental drivers designed for Windows 11 have been reported to cause the “Device Descriptor Request Failed” error on some Windows 10 legacy builds. The best practice is to avoid beta or Windows 11-centric drivers.

Was this article helpful?

Thank you!