Issue: "The device cannot start (Code 10)"
Issue: Only USB 2.0 speeds (Slow transfer)
Issue: Device disconnects randomly
Because "FJU02S" is often the model number of the card rather than the chip itself, you need to know which controller chip the card uses. The driver depends entirely on this chip. fju02s driver updated
Common Chipsets used in FJU02S cards:
How to check: If you can safely open your computer case, look at the largest chip on the FJU02S card. The brand name will be printed on it. Use the driver corresponding to that brand below.
The FJU02S is typically a 2-Port USB 3.0 PCI Express (PCIe) Expansion Card. It is commonly used to add high-speed USB 3.0 ports to older desktop computers that only have USB 2.0 ports, or to increase the number of available ports on newer machines. Issue: "The device cannot start (Code 10)"
These cards are often generic or sold under various brand names (sometimes unbranded), which can make finding the specific driver difficult.
Check the driver version:
Expected output: version: 2.3.1
Cause: The driver installation did not complete the commit phase. Fix: Use the Windows Driver Store Explorer (RAPR.exe) to remove all stale instances of fju02s before reinstalling.
Windows (via Device Manager)
Linux (DKMS method recommended)
sudo apt remove fjutils # if older version installed
tar -xzf fju02s-driver-2.3.1.tar.gz
cd fju02s-driver-2.3.1
make && sudo make install
sudo modprobe fju02s
Microsoft maintains a certified catalog for drivers. To get the fju02s driver updated automatically: