Disable internet (unplug Wi-Fi). This prevents Windows from installing the wrong driver automatically.
Leave a comment below (or check Realtek’s official support forum). And remember: When in doubt, uninstall, reboot, and reinstall the latest signed driver from scratch. Keywords used: JP108 USB LAN Driver, JP108 driver, Realtek RTL8152 driver, USB LAN adapter driver, JP108 Ethernet not working, install JP108 on Windows 11, JP108 Mac driver.
Plug in the JP108 adapter when prompted (or after reboot). Jp108 Usb Lan Driver
Run the installer you downloaded (e.g., Setup.exe from Realtek).
A: Check your Ethernet cable. You need Cat 5e or Cat 6 cable. Also, verify the driver properties: Advanced tab > Speed & Duplex > Set to "Auto Negotiation" (not forced 100Mbps). Disable internet (unplug Wi-Fi)
| Driver Version | Download Speed (Mbps) | CPU Usage (Peak) | Ping Stability | |----------------|----------------------|------------------|----------------| | Windows Default (2019) | 72 Mbps | 18% | Unstable (spikes to 200ms) | | Realtek v7.47 (2021) | 92 Mbps | 11% | Stable (±5ms) | | Realtek v1156 (2024) | 98 Mbps (near theoretical max for Fast Ethernet) | 8% | Rock solid |
A: Windows Update overwrites new drivers. To stop this: Go to System Properties > Hardware > Device Installation Settings > No (don’t download drivers from Windows Update). And remember: When in doubt, uninstall, reboot, and
A: Yes, if it uses the same Realtek RTL8152/8153 chipset. The driver is chipset-specific, not brand-specific.