ASUS ExpertBook B9 WiFi Keeps Disconnecting Windows 11: Fix Guide

The ASUS ExpertBook B9 is a business ultrabook with an Intel WiFi adapter. On Windows 11, users report the connection dropping every few minutes or losing internet while still showing connected. This guide covers every proven fix.

Why ASUS ExpertBook B9 WiFi Keeps Disconnecting

Intel WiFi Driver Replaced by Windows Update

Windows Update can replace the ASUS-validated Intel WiFi driver with a generic version not tuned for the ExpertBook B9 antenna configuration. After this swap, WiFi drops frequently and may not reconnect without manual help. Reinstalling the ASUS-provided driver from the support page restores stable operation.

WiFi Power Management Cutting the Connection

Windows 11 enables aggressive power management on WiFi adapters by default. On battery, the adapter enters a low-power state between bursts of activity and sometimes fails to wake fast enough. Signs this is the cause include:

• Drops occur mainly on battery, not when plugged in
• Connection restores immediately after pressing a key
• Setting power plan to High Performance eliminates the drops

DNS or IP Lease Renewal Failure

Even when the physical WiFi layer stays connected, a DNS failure or DHCP lease expiry can make internet appear broken. The network icon shows connected but pages stop loading. Flushing DNS and renewing the IP address resolves this quickly.

How to Fix ASUS ExpertBook B9 WiFi Disconnecting

Step 1: Disable WiFi Adapter Power Management

1. Open Device Manager, expand Network Adapters, right-click the Intel WiFi adapter.
2. Go to Properties, then Power Management.
3. Uncheck Allow the computer to turn off this device to save power.
4. Click OK and restart.

Step 2: Reinstall ASUS-Validated Intel WiFi Driver

Download the WiFi driver from the ASUS support page for your ExpertBook B9 model. Uninstall the current Intel WiFi driver from Device Manager, restart, then run the ASUS driver installer. Test by streaming video for 30 minutes to confirm stability.

Step 3: Flush DNS and Reset Network Stack

Open Command Prompt as administrator and run these commands in order: netsh winsock reset, netsh int ip reset, ipconfig /release, ipconfig /flushdns, ipconfig /renew. Restart after all five commands complete.

My ExpertBook B9 WiFi dropped every 10 minutes. Disabling power management in Device Manager fixed it completely. The ASUS driver helped too. — Nathan W., ASUS ExpertBook user

Frequently Asked Questions

What Intel WiFi adapter does ASUS ExpertBook B9 use?

Depending on generation, the ExpertBook B9 uses Intel Wi-Fi 6 AX200, AX201, or AX211. All benefit from the same driver and power management fixes. Check Device Manager under Network Adapters to confirm your adapter.

Can I use a USB WiFi adapter as a workaround?

Yes, a USB Wi-Fi 6 dongle works temporarily. However, fixing the internal adapter with the ASUS driver gives the best long-term performance and avoids occupying a USB port.

Why does ExpertBook B9 WiFi work on some networks but not others?

This usually points to a router 5GHz channel or band steering issue. Try connecting manually to the 2.4GHz band. If stability improves, change your router 5GHz channel or update router firmware.

Does Windows 11 affect ExpertBook B9 WiFi differently than older Windows?

Yes. Windows 11 introduced more aggressive WiFi power management defaults. Units that worked on earlier Windows can develop drops after upgrading. Disabling WiFi power saving in Device Manager resolves this in most cases.

Conclusion

ASUS ExpertBook B9 WiFi disconnecting on Windows 11 is almost always caused by power management or an incompatible driver installed by Windows Update. Disable WiFi power management in Device Manager first, then reinstall the ASUS-validated Intel driver, and reset the network stack with command prompt. These three steps resolve drops on the ExpertBook B9 in nearly all cases.