HP EliteBook 840 G11 Intel Core Ultra 5 135U WiFi Not Working Fix Windows 11

The WiFi on your HP EliteBook 840 G11 Intel Core Ultra 5 135U is not working – the WiFi adapter does not appear in network settings, shows as disabled, or connects but drops frequently. HP enterprise WiFi driver installation and network configuration restore reliable wireless connectivity on the HP EliteBook 840 G11.

This guide covers Intel WiFi driver updates, enterprise network configuration, and power management settings for the HP EliteBook 840 G11 Intel Core Ultra 5 135U in Windows 11.

“EliteBook 840 G11 WiFi kept dropping from enterprise network every 20 minutes. IT found Intel WiFi power saving mode was disconnecting to save power. Disabled power saving in Device Manager and WiFi has been stable for months.” – Zuber, senior IT engineer from KLCC

Why WiFi Does Not Work on HP EliteBook 840 G11

The HP EliteBook 840 G11 uses Intel WiFi 6E AX211 with HP enterprise software components for HP Sure Connect WiFi reliability and HP Wolf Security network threat protection. These enterprise components require the HP-qualified Intel WiFi driver that includes HP-specific enterprise authentication extensions. After Windows Update or a generic Intel WiFi driver installation, the HP enterprise WiFi extensions may be removed, causing enterprise network authentication (802.1X, PEAP, certificate-based) to fail on corporate networks even though consumer WPA2 Personal networks continue to work.

• Intel WiFi driver replaced by generic version – HP enterprise authentication extensions missing
• HP Sure Connect or HP Wolf Security blocking wireless adapter due to security policy violation
• Intel WiFi power saving mode disconnecting adapter after brief idle period on enterprise networks
• Enterprise network 802.1X certificate expired or Windows certificate store not updated

Fix 1 – Update Intel WiFi Driver via HP Support Assistant

Open HP Support Assistant and check for Intel WLAN or WiFi 6E driver updates. Install the HP-qualified Intel WiFi 6E AX211 driver and restart. HP enterprise WiFi driver for EliteBook 840 G11 includes 802.1X PEAP authentication profile support, WPA3 Enterprise compatibility, and HP Sure Connect driver integration that monitors WiFi connection quality and automatically reconnects. After driver update, reconnect to the enterprise network and verify 802.1X authentication completes correctly – if certificate authentication still fails, the issue is the Windows certificate store rather than the WiFi driver.

Fix 2 – Disable Intel WiFi Power Saving

Open Device Manager – Network adapters – Intel WiFi 6E AX211 – Properties – Power Management. Uncheck Allow the computer to turn off this device to save power. Also open the Advanced tab and find Power Management Mode or Power Saving Mode. Set to Maximum Performance. On enterprise networks that require frequent keepalive packets (Cisco ISE, FortiGate, Microsoft NPS), the Intel WiFi power saving mode can reduce packet transmission frequency, causing the network authentication server to consider the EliteBook session timed out and disconnect the 802.1X session – appearing as a spontaneous WiFi disconnection every 15-30 minutes.

Reset Network Stack

Open Command Prompt as administrator and run: netsh winsock reset then netsh int ip reset then ipconfig /flushdns. Restart. These commands reset the Windows networking stack to defaults, resolving cases where cumulative Windows network driver updates leave stale registry entries that cause connection failures on specific enterprise network protocols. After stack reset and restart, reconnect to the enterprise network from scratch to establish a clean connection with the updated network driver components on the HP EliteBook 840 G11.

Fix 3 – Check HP Wolf Security Network Settings

Open HP Wolf Security Console or HP Security Manager if installed on the EliteBook 840 G11. Check Network Protection settings that may classify the current enterprise network as untrusted and restrict WiFi adapter functionality as a security measure. HP Wolf Security can block wireless connections to networks that do not match pre-approved network profiles in enterprise managed deployments. If HP Wolf Security is causing the WiFi restriction, the IT administrator must add the enterprise network SSID and certificate thumbprint to the approved network list in HP Wolf Security policy management for the EliteBook 840 G11 fleet.

Fix 4 – Update Enterprise WiFi Certificate

If WiFi connects but enterprise authentication fails (shown as Limited Access or Authentication Error rather than complete no-connectivity), the 802.1X authentication certificate in the Windows certificate store may have expired. Open Certificate Manager (certmgr.msc) and check Personal – Certificates for an expired user certificate issued by the enterprise CA. Contact IT department to re-issue an updated user certificate via SCEP or manual enrollment. Updated certificate restores 802.1X PEAP authentication to the enterprise wireless network on the HP EliteBook 840 G11 without any driver or network stack changes required.

Frequently Asked Questions

Why is WiFi not working on HP EliteBook 840 G11 Intel Core Ultra 5 135U?

Intel WiFi driver needs HP-qualified version from HP Support Assistant. Power saving mode may disconnect enterprise sessions. HP Wolf Security may restrict untrusted networks.

How do I fix WiFi on HP EliteBook 840 G11?

HP-qualified Intel WiFi driver from HP Support Assistant, disable Intel WiFi power saving in Device Manager, reset network stack with netsh commands, check 802.1X certificate validity.

Does HP EliteBook 840 G11 Intel Core Ultra 5 135U support WiFi 6E?

Yes – Intel WiFi 6E AX211 with WPA3 Enterprise and 802.1X enterprise authentication in HP-qualified driver for enterprise network compatibility.

Why does HP EliteBook 840 G11 WiFi disconnect frequently?

Intel WiFi power saving mode timing out enterprise keepalive. Disable power saving in Device Manager – Network adapter – Power Management. Set Power Mode to Maximum Performance.

Conclusion

HP EliteBook 840 G11 Intel Core Ultra 5 135U WiFi not working in Windows 11 is resolved by installing the HP-qualified Intel WiFi 6E AX211 driver from HP Support Assistant for enterprise authentication compatibility. Disabling Intel WiFi power saving in Device Manager prevents 802.1X enterprise session timeouts from spontaneous power-saving disconnections. Network stack reset via Command Prompt netsh commands clears stale registry entries from previous driver installations. Enterprise certificate renewal from IT restores 802.1X PEAP authentication when user certificates have expired in the Windows certificate store.