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

1. Device Manager → Network adapters → Wi-Fi/Ethernet
2. Properties → Power Management
3. 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 can inspect the relevant local evidence and propose a fix plan for review.

[CTA: Try free diagnosis]

Related: Wi-Fi Connected No Internet | Ethernet Valid IP