controller. While advertised as USB 2.0, many of these devices actually operate at USB 1.1 speeds (roughly 6–7 Mbps). Because the chipset is dated, Windows 11 frequently misidentifies it as a "Generic USB Device" or "QTS1081B" instead of a network card. Step-by-Step Installation for Windows 11
The JP1081B USB LAN adapter serves as a budget-friendly solution for devices lacking an RJ45 port. However, its reliance on the SR9700 or RD9700 chipset creates a significant hurdle for Windows 11 users. Windows 11 requires strict driver signing and frequently lacks built-in support for these legacy Chinese chipsets. When plugged in, the device often appears as an "Unknown Device" or a "USB 2.0 10/100M Ethernet Adapter" with a yellow exclamation mark in Device Manager. jp1081b usb lan driver windows 11
If the device is already connected to your computer, you can check the Device Manager to see if Windows 11 has a driver for it. controller
: You can find various versions for the JP1081B / RD9700 chipset on databases like DriverIdentifier. Step-by-Step Installation for Windows 11 The JP1081B USB
Ensure "Energy Efficient Ethernet" is disabled in the adapter's Advanced Properties .