ASUS ExpertBook B1 B1502 Ethernet Driver Missing Fix
ASUS ExpertBook B1 B1502 · Core i5-1235U · Windows 11 · Realtek Ethernet
Install the Realtek Ethernet driver from ASUS Support
Go to the ASUS Support page, enter ExpertBook B1 B1502, and navigate to Drivers & Software → Network. Download the Realtek LAN driver. Run the installer and restart. After a clean Windows installation this driver is never included automatically.
Scan for hardware changes in Device Manager
Open Device Manager → Action → Scan for hardware changes. If the Ethernet controller appears under Other devices with a yellow warning, right-click it and choose Update driver → Search automatically. Windows may find and install the correct Realtek driver from Windows Update.
Use Windows Update optional drivers
Go to Settings → Windows Update → Advanced options → Optional updates. Look for a Realtek Ethernet driver in the Driver updates section and install it. Microsoft indexes OEM network drivers here and it is sometimes the fastest path to a working LAN connection.
Update the BIOS
Install the latest BIOS from ASUS Support for the B1502. In rare cases a BIOS update is required to correctly initialize the Realtek Ethernet controller during Windows boot, particularly on machines that arrived with an early production BIOS.
Use a USB-to-Ethernet adapter temporarily
If you need internet access to download the driver but have no Wi-Fi, use a USB-to-Ethernet adapter or a phone USB tethering connection. Once online, visit ASUS Support directly and download the Realtek LAN driver installer to fix the built-in port.
Reset network settings as a last step
Go to Settings → Network & Internet → Advanced network settings → Network reset. This clears all network adapter configurations and reinstalls all driver defaults. Use this only if the Ethernet driver installs but the adapter still fails to connect to any network.
Siti, Kuantan: “After reinstalling Windows on my ExpertBook B1502, the LAN port was completely missing from Device Manager. Installing the Realtek driver from ASUS Support fixed it immediately and the port worked on first plug-in.”
Frequently Asked Questions
Why is the Ethernet adapter missing after reinstalling Windows on the B1502?
Windows does not include the Realtek PCIe GBE LAN driver by default. After a clean Windows installation you must manually download and install the Realtek Ethernet driver from ASUS Support to restore wired network functionality.
What Ethernet chip does the ASUS ExpertBook B1 B1502 use?
The B1502 uses a Realtek RTL8111 or RTL8168 PCIe Gigabit Ethernet controller. Both variants use the same Realtek LAN driver available from ASUS Support under the Network category.
Can I use Wi-Fi while fixing the Ethernet driver?
Yes. The ExpertBook B1502 has an Intel or Realtek Wi-Fi adapter separately from the LAN port. If Wi-Fi also stopped working after a reinstall, download both drivers on another device and transfer them via USB drive.
Will the Ethernet port show up as Unknown Device if the driver is missing?
Yes. Without the Realtek driver, the Ethernet controller appears in Device Manager under Other devices as Ethernet Controller or PCI Device with a yellow warning triangle. Installing the Realtek LAN driver removes this warning and enables the port.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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