Is your Windows 11 running on a standard processor or an ARM-based laptop?
Open and expand Network adapters . The device should now read RD9700 USB 2.0 To Fast Ethernet Adapter (or similar) without any error icons.
The VK-QF9700 is a widely used USB 2.0 to Fast Ethernet adapter. It allows devices without a built-in Ethernet port to connect to wired networks.
Some users encounter a blue screen of death referencing the file qf97usb.sys . This is typically caused by a corrupted driver, an outdated driver, or defective hardware. To resolve it: vk-qf9700 driver windows 11
Look for an item with a yellow exclamation mark named or QF9700 . Right-click the device and select Properties . Navigate to the Details tab. Click the Property dropdown and select Hardware Ids .
Getting the VK-QF9700 USB adapter to work on Windows 11 can be tricky because the hardware is older and often relies on generic drivers that may not automatically install correctly.
No official driver from MosChip or Microsoft exists specifically for Windows 11. However, the Windows 10/8.1 driver works perfectly if installed correctly. Is your Windows 11 running on a standard
Once installed, users must also manage their expectations regarding performance. The VK-QF9700 is a Fast Ethernet adapter, meaning it is capped at 100 Mbps. In a Windows 11 environment, which is often optimized for Gigabit speeds and high-bandwidth cloud computing, the adapter becomes a bottleneck. While it successfully provides a stable wired connection—essential for large file transfers or stable remote desktop sessions where Wi-Fi is unreliable—it cannot utilize the full potential of modern networking infrastructure. Furthermore, because the drivers are likely legacy code wrapped for compatibility, users may experience higher CPU utilization during heavy network loads compared to modern, native USB-C Ethernet controllers.
is a generic hardware model, there is no single "official" website. Instead, you can find the necessary software through these channels:
Look for the last stable deployment package: . The VK-QF9700 is a widely used USB 2
Method 2: Manually Install Driver via Core Chipset Manufacturers
If you encounter issues, here are some common problems and solutions:
If Windows does not find the driver, you can try these sources (note that drivers for Windows 10 typically work on Windows 11): Provides downloads for the Corechip QF9700 for various Windows versions.