Download the CAB file matching your Windows 10 architecture (64-bit or 32-bit). Extract the CAB file using tools like 7-Zip.
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After reboot, go back to Device Manager. Your adapter should now show as:
Uninstall the device in Device Manager, check "Delete the driver software for this device," restart your computer, and let Windows reinstall it.
This is one of the most successful and mass-produced Fast Ethernet controllers in computing history. It tops out at a maximum speed of 100 Mbps . It is physically impossible for a true RTL8139 chip to achieve Gigabit (1000 Mbps) speeds. realtek rtl8139 driver 810x family pci-e gigabit windows 10
To help give you the most accurate advice moving forward, could you tell me if you are currently encountering a specific (like Code 10) in Device Manager? Also, please AI responses may include mistakes. Learn more Share public link
The Ultimate Guide to Realtek RTL8139 and 810X Family Drivers on Windows 10
Integrated single-chip design with support for ACPI power management, remote wake-up (Magic Packet), and PCI bus master data transfers. Windows 10 Compatibility
This is the safest method to check if Microsoft has an updated, stable driver archived on its servers. Download the CAB file matching your Windows 10
If you are trying to revive an older desktop computer or maintain a legacy server running Windows 10, you might have encountered a frustrating network connectivity issue. Your Device Manager might display a yellow exclamation mark next to a device labeled , or you might be mistakenly searching for a "PCI-E Gigabit" driver for a card that only supports Fast Ethernet.
In the tab of your card's properties, click on Speed & Duplex .
Official support for the RTL8139 family generally ended with Windows 7/8. However, these cards can often still work on Windows 10 using the following methods: Go to product viewer dialog for this item. Realtek RTL8139D 10/100Mbps Ethernet Card - PCI
Go to the tab, check Run this program in compatibility mode for , and choose Windows 7 or Windows 8 . Run the installer as an administrator. Troubleshooting Common Connection Issues This link or copies made by others cannot be deleted
If you own an actual RTL8139 PCI card and the workaround drivers cause system instability or blue screens, do not waste hours troubleshooting. The physical hardware limits you to 100 Mbps speeds, which throttles modern broadband internet connections.
If your internet connection is dropping or Windows shows a yellow exclamation mark next to your Realtek controller, you need to manually refresh the driver. Use the following methods to resolve the issue. Method 1: Update Via Windows Device Manager
If the download is a .zip file, extract it to a folder on your desktop.
This often happens on 64-bit systems because the legacy 32-bit architecture fails to translate. Ensure you have forced the driver using Method 3 above, specifically choosing a 64-bit signed driver from the final Windows 7 catalog. Issue 2: Random Disconnections under Heavy Load