Sometimes Windows sees the device but doesn't know which driver to use. Press Win + X and select . Look for " QF9700 USB2.0 To Fast Ethernet Adapter " (it may have a yellow warning icon). Right-click it and select Update driver . Choose "Browse my computer for drivers" followed by "Let me pick from a list of available drivers."
If you cannot find the original VIA driver, Windows 11 has a hidden legacy driver that sometimes works. vk-qf9700 driver windows 11
For ~$15, get a USB 3.0 Gigabit adapter (Realtek RTL8153 or RTL8156) that works natively on Windows 11. The VK-QF9700 is a legacy product that Windows 11 actively fights. If you have it lying around, you can make it work in <10 minutes with the right guide—but don’t buy a new one expecting convenience. Sometimes Windows sees the device but doesn't know
Understanding the hardware helps ensure you are using the correct software. The typically features: QF9700 USB2.0 To Fast Ethernet Adapter - DriverMax Right-click it and select Update driver