Default Gateway Not Available Windows 11 Fix [2026]

Quick Answer: Default gateway missing because network adapter lost its DHCP lease or power management turned off the adapter. Run ipconfig /renew and disable "Allow computer to turn off this device" in adapter properties.

Symptoms

"Default gateway not available" in Network troubleshooter
Can connect to router but not internet
Yellow triangle on network icon
Intermittent connectivity

Root Cause

DHCP lease expired, power management issues, or corrupted TCP/IP stack.

Fix

Method 1: Renew IP Configuration

ipconfig /release
ipconfig /renew
ipconfig /flushdns

Method 2: Disable Power Management

Device Manager → Network adapters → Wi-Fi/Ethernet
Properties → Power Management
Uncheck "Allow computer to turn off this device"

Method 3: Reset TCP/IP

netsh int ip reset
netsh winsock reset
Restart-Computer

Method 4: Update Network Drivers

Get-PnpDevice -Class Net | Update-PnpDevice

How Againly Helps

Againly runs check_network_stack to detect gateway failures and auto-renews DHCP configuration.

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