Realtek RTL8139 Family PCI Fast Ethernet NIC #3 Driver

The Realtek RTL8139 Family PCI Fast Ethernet NIC #3 driver lets Windows communicate with this Realtek PCI network adapter so your computer can use a wired Ethernet connection. It is intended for users restoring network access after reinstalling Windows, troubleshooting an unrecognized adapter, or replacing a missing or incompatible driver.

Key Features

• Enables wired networking through the RTL8139 family’s 10/100 Mbps Fast Ethernet hardware, allowing access to local networks and the internet.
• Helps Windows recognize and manage the adapter in Device Manager instead of listing it as an unknown Ethernet controller.
• Provides the driver support needed for normal network operation, including communication with compatible Ethernet routers and switches.
• Offers driver options for Windows 10, 8.1, 7, Vista, and XP, depending on the package. Match the download to your Windows version and 32-bit or 64-bit system architecture.

How to Install Realtek RTL8139 Family PCI Fast Ethernet NIC #3 Driver

1. Identify your adapter and operating system. Open Device Manager and locate the adapter under Network adapters or Other devices. Check its Hardware IDs under Properties > Details, then confirm your Windows version and system architecture. The “#3” suffix typically identifies a Windows device instance, not a separate hardware model.
2. Choose a compatible package. Before starting your Realtek RTL8139 Family PCI Fast Ethernet NIC #3 driver download for Windows, verify that the package supports your hardware ID and operating system. Select the latest version that explicitly supports your configuration; a newer package is not automatically a better match.
3. Download and extract the files. Use a trusted source for a free download, and extract the archive if necessary. If the affected computer has no internet access, download the package on another computer and transfer it using a USB drive.
4. Install the driver. Run the included installer, if provided. Alternatively, right-click the adapter in Device Manager, select Update driver, and browse to the extracted driver folder.
5. Restart and test. Restart Windows if prompted, connect an Ethernet cable, and check that the adapter appears without a warning symbol. Test access to your router or a website.

Keep a backup of a working driver before you update, and prioritize compatibility over version numbers. For Windows 10/11 systems, verify support separately: Windows 10 is listed for this device, but Windows 11 compatibility should not be assumed. An update may help resolve driver-related issues, though cable, router, and network settings can also affect connectivity.