In some localized builds of Windows 10 and 11, the KP206BUB driver is distributed through Windows Update as a generic "USB Composite Parent Driver." To force this:

Use the "Roll Back Driver" feature in Device Manager or manually select an older version (typically version 3.2 or earlier) from the "Let me pick from a list of available drivers" menu. Driver is "Unsigned"

Do not plug the cable into your PC until the software is installed.

If you are working with industrial automation, GPS modules, or DIY electronics, you’ve likely encountered the . This specific chipset is a USB-to-Serial bridge—essentially the "translator" that allows your modern computer to talk to older or specialized hardware via a COM port.