The KNU400X-L is a network device manufactured by Mercury. Issues like weak Wi-Fi signal, slow DNS lookup, duplicate IP addresses, slow network and excessive CPU usage can be solved by updating this driver. This version of "LAN_realtek_5.505.1004.2002.exe" has been downloaded 345 times with a user rating of 5 out of 5 stars, based on 13 reviews. It has been installed successfully by our users on PCs running Windows XP. The total disk space used for this update is 2.6 MB.
KNU400X-L
Realtek RTL8139 C+ Fast Ethernet NIC
Realtek RTL8139/810X Family CardBus Fast Ethernet NIC
Realtek RTL8139/810X Family CardBus Fast Ethernet NIC(for Win95A)
Realtek RTL8139/810X Family Fast Ethernet NIC
Realtek RTL8139/810X Family PCI Fast Ethernet NIC
Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows ME, Windows 98SE, Windows 98, Windows 95
5.505.1004.2002 (7-Jul-2004)
5.505.1004.2002 (2002-10-04) via .inf
Althon Socket A Series
nVIDIA Chipset
Onboard LAN Driver
Nagarajah (DG Staff Member) on 18-Mar-2005
To get the KNU400X-L 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 Mercury KNU400X-L 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 Mercury 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 Mercury website. Most major device manufacturers update their drivers regularly.
After downloading your new driver, it's time to install it. For Windows users, the built-in Device Manager is your go-to tool for managing system devices and drivers. Here's how to use it:
Right-click the Start button to open the Quick Access menu.
Select "Device Manager" from the list of options.
In the Device Manager window, locate the device that needs updating.
Right-click on the device name and choose "Update driver" from the context menu.
Follow the on-screen instructions to complete the installation process.
Once the installation is complete, restart your computer to ensure the new driver is properly integrated and functional.
This simple process helps keep your system running smoothly and maintains compatibility with your hardware components.
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.
The following files are found inside the driver download file.
Name | Size | Date |
---|---|---|
realtek_lan/data1.cab | 1.5 MB | 19 Feb 2003 |
realtek_lan/data2.cab | 35.3 KB | 19 Feb 2003 |
realtek_lan/ikernel.ex_ | 344.9 KB | 19 Feb 2003 |
realtek_lan/layout.bin | 417 bytes | 19 Feb 2003 |
realtek_lan/Setup.exe | 166.9 KB | 19 Feb 2003 |
realtek_lan/Setup.ini | 591 bytes | 19 Feb 2003 |
realtek_lan/SETUP.TXT | 2.5 KB | 19 Feb 2003 |
realtek_lan/WINXP/Netrts51.INF | 17.6 KB | 19 Feb 2003 |
realtek_lan/WINXP/Netrtsxp.cat | 7.4 KB | 19 Feb 2003 |
realtek_lan/WINXP/R8139n51.sys | 47.0 KB | 19 Feb 2003 |
realtek_lan/winnt_readme/nt.htm.bak | 2.5 KB | 29 Jun 2001 |
realtek_lan/winnt4/OEMSETUP.INF | 49.8 KB | 31 Jan 2002 |
realtek_lan/winnt4/r8139n4.sys | 63.5 KB | 6 Nov 2002 |
realtek_lan/winnt4/NT4CardBus/OEMSETUP.INF | 35.4 KB | 18 Feb 2002 |
realtek_lan/winnt4/NT4CardBus/r8139n4.sys | 63.5 KB | 6 Nov 2002 |
realtek_lan/winnt4/NT4CardBus/RESDLG.DLL | 28.2 KB | 14 Jul 1999 |
realtek_lan/WINME/Netrts.cat | 7.7 KB | 19 Feb 2003 |
realtek_lan/WINME/Netrts5.INF | 19.2 KB | 19 Feb 2003 |
realtek_lan/WINME/R8139n5.sys | 49.4 KB | 19 Feb 2003 |
realtek_lan/WIN98/Netrts5.INF | 19.2 KB | 19 Feb 2003 |
realtek_lan/WIN98/R8139n5.sys | 49.4 KB | 19 Feb 2003 |
realtek_lan/WIN95A/NETRTS.INF | 8.4 KB | 19 Feb 2003 |
realtek_lan/WIN95A/RTL8139.SYS | 36.9 KB | 19 Feb 2003 |
realtek_lan/WIN2000/Netrts2k.cat | 7.7 KB | 19 Feb 2003 |
realtek_lan/WIN2000/Netrts5.INF | 19.2 KB | 19 Feb 2003 |
realtek_lan/WIN2000/R8139n5.sys | 49.4 KB | 19 Feb 2003 |
realtek_lan/W95OSR2/NETRTS.INF | 7.5 KB | 19 Feb 2003 |
realtek_lan/W95OSR2/RTL8139.SYS | 37.4 KB | 19 Feb 2003 |