The is one of the most widely cloned chipset identifiers in the networking world. Found in countless inexpensive USB-to-Ethernet adapters (often branded as "RdLink," "Cable Matters," or generic "USB 2.0 to RJ45"), this chipset has been a reliable workhorse for Windows 7, 8, and 10. However, with the release of Windows 11, Microsoft introduced stricter driver signing policies and a revamped network stack.

You have an old adapter, need a temporary fix, or are troubleshooting a legacy device.

Microsoft did not intentionally block the VK-QF9700 in Windows 11, but they deprecated many legacy NDIS 5.1 drivers. The working driver for this chipset is actually a modified version of the driver (Davicom DM9601 USB Ethernet adapter).