| Issue | Likely Cause | Fix | | :--- | :--- | :--- | | | Incorrect or missing driver installed. | This is the most common error. A yellow exclamation mark in Device Manager indicates a driver problem. Follow the Device Manager installation method or the RD9700 fallback method to install the correct driver. | | Blue Screen of Death (BSOD) - qf97usb.sys | Corrupted driver installation or driver conflict. | The BSOD is often caused by a problem with the qf97usb.sys file. Your best course of action is to uninstall the current driver, restart your PC, and then perform a clean installation of the RD9700 driver. A BSOD can sometimes be due to faulty hardware, so test the adapter on another computer if possible. | | "Code 10" Error – This device cannot start | System resource conflict or corrupted driver state. | This error can sometimes be triggered by a specific Windows 11 update (e.g., KB5050021) that breaks compatibility. Try uninstalling the driver from Device Manager, then scan for hardware changes to reinstall it. If that fails, you may need to uninstall the problematic Windows Update or use System Restore to revert to a point before the issue occurred. | | Slow or Unstable Connection | Faulty hardware or incorrect driver settings. | First, check your physical connections. Ensure the Ethernet cable is not damaged and is securely plugged in. Also, try connecting the adapter to a different USB port, especially one that is directly on your motherboard (not a hub or front panel), as this can sometimes resolve power or resource issues. | | Adapter Not Working After Windows Update | A new Windows 11 update introduced incompatibility. | This is a known issue where a Windows update can "break" a previously working driver. You can try to roll back the driver in Device Manager (under the Driver tab, click "Roll Back Driver") or uninstall the problematic Windows update . |
| Rating | ⭐⭐ (2/5) | |--------|-----------| | | Cheap, works after manual driver install, fine for basic 100 Mbps use | | Cons | No plug-and-play on Win11, driver hunting needed, potential update conflicts, slow by modern standards |
You will see something similar to:
After restarting, your VK-QF9700 should load correctly. Once you are finished using the adapter, return to the same settings and turn Memory Integrity back on. vk-qf9700 driver windows 11
That said, Windows 11 imposes stricter security requirements than any previous version of Windows. Even if the driver is technically compatible, Windows 11 may refuse to load it because it does not meet modern signing standards or virtualization‑based security rules. This does not mean the driver is broken; it means Windows is actively blocking it to protect your system.
(often recognized as the QF9700 USB 2.0 to Fast Ethernet Adapter
The is a budget-friendly USB 2.0 to Fast Ethernet adapter, typically used to provide a wired internet connection to laptops or desktops lacking a built-in RJ45 port . While it is a common "plug-and-play" device, users on Windows 11 may occasionally face compatibility issues because the hardware is often based on older chipsets from manufacturers like Corechip or Genoa Systems . Where to Find the VK-QF9700 Driver | Issue | Likely Cause | Fix |
Method 2: Manually Install Driver via Core Chipset Manufacturers
Look for "Driver updates" and see if a "Corechip" or "QF9700" driver is listed. If so, select and install it. 2. Manual Driver Installation
To install or update the VK-QF9700 driver on Windows 11: Follow the Device Manager installation method or the
: Windows 11 often includes built-in generic drivers that support this adapter automatically. Alternative Chipset Drivers : The
VIA (now part of HTC) technically stopped updating this driver after Windows 8. However, the final signed driver package works flawlessly on Windows 11 if installed manually.
Windows 11 has stricter driver signature enforcement and removed legacy NDIS 5.x support that some older QF9700 drivers relied on. Consequently, the generic Microsoft driver installed automatically may cause or Code 52 (Driver not signed) errors.
Locate the "Unknown Device" or "QF9700" under . Right-click the device and select Update driver . Choose "Browse my computer for drivers" .