RealTek RTL81390 Fast Ethernet Controller Driver

The RealTek RTL81390 Fast Ethernet Controller driver enables Windows to communicate with the controller and use its wired Ethernet connection. You may need it after reinstalling Windows, when Device Manager lists an unknown network device, or if an existing driver is missing or damaged.

Key Features

• Wired network connectivity: Provides the software interface Windows needs to send and receive data through the Ethernet controller.
• Hardware recognition: Helps Windows identify and configure the network adapter so it can appear correctly in Device Manager.
• Network configuration support: Works with Windows networking tools to manage the adapter and access local networks or the internet.
• Maintenance and troubleshooting: Installing a compatible replacement can help resolve problems caused by corrupted or incorrectly installed driver files.

Before choosing a RealTek RTL81390 Fast Ethernet Controller driver download for Windows, verify the adapter’s hardware ID and the package’s compatibility information. For Windows 11, 10, 8, or 7, select a package that explicitly supports your operating system and architecture. Do not assume that an older driver will work on Windows 10/11 simply because the device name matches.

How to Install RealTek RTL81390 Fast Ethernet Controller Driver

1. Identify the adapter. Open Device Manager and locate the controller under Network adapters or Other devices. Open Properties, select Details, and choose Hardware Ids to confirm the device.
2. Choose a compatible package. Look for the latest version that explicitly supports your hardware ID and Windows edition. Prefer a trusted, digitally signed package when selecting a free download.
3. Prepare the files. Download and extract the package if necessary. If the computer has no internet connection, use another device and transfer the files using a USB drive.
4. Install the driver. Run the included installer and follow its prompts. Alternatively, right-click the controller in Device Manager, select Update driver, and choose Browse my computer for drivers to locate the extracted folder.
5. Check the connection. Restart if prompted, confirm that Device Manager shows no warning icon, and test Ethernet access with a connected network cable.

Keep the driver updated when a compatible release addresses a relevant issue or improves reliability. Before an update, save a copy of the working installer or create a restore point. If your connection is stable, prioritize verified compatibility over installing a newer package solely because it is available.

Common Issues and Fixes

• Install fails or rolls back: Confirm the RealTek RTL81390 package matches your Windows version and architecture. Run the installer as administrator, temporarily pause antivirus, or use Device Manager → Update driver → Browse to the extracted driver folder.
• Device not detected: Check that the onboard NIC is enabled in BIOS or that the PCI card is seated properly. Verify link LEDs, then use Device Manager → Scan for hardware changes. A missing yellow-bang entry usually indicates a slot/BIOS or hardware-detection issue.
• Version conflicts after update: Uninstall the existing RealTek adapter in Device Manager and select “Delete the driver software,” reboot, then install one correct RTL81390 driver package. Avoid mixing generic Windows and vendor drivers; use Roll Back Driver if a newer version breaks connectivity.