Scroll to or check under Other Devices if it is uninstalled.
Go to microsoft.com and search for "Nuvoton Communications Port Windows 10". Download the version that matches your system architecture (64-bit or 32-bit). Step 3: Install the Driver via Device Manager
A yellow triangle appears next to "Unknown Device" or "Communications Port".
Restart your computer when the installation finishes to apply the changes. Method 2: Manual Installation via Device Manager
If Windows Update fails automatically, you can pull the official driver manually:
Many Nuvoton drivers download as a .zip or .cab file rather than an executable installer. Here is how to force Windows 10 to install it: Extract the downloaded folder to your Desktop. Open again.