Microsoft Realtek RTL8139(B/C) CardBus Fast Ethernet Driver Download

How to Update Realtek RTL8139(B/C) CardBus Fast Ethernet Device Drivers

Step 1 - Download Your Driver

To get the Realtek RTL8139(B/C) CardBus Fast Ethernet driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Microsoft Realtek RTL8139(B/C) CardBus Fast Ethernet into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Microsoft Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Microsoft website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

After downloading your new driver, installation is the next step. On Windows, utilize the built-in Device Manager utility to manage this process. This tool provides a comprehensive view of all system-recognized devices and their associated drivers. To complete the installation, a system restart is typically required for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.