Fixing Ethernet Connection Issues: 10 Fixes for Windows 11/10 in 2026

Your ethernet cable is plugged in, but your internet won’t work. The little network icon shows a problem, and you’re stuck without a connection. This happens to millions of people, and the good news is most ethernet issues have simple fixes you can do yourself.

What Causes Ethernet Connection Problems?

Before jumping into fixes, understanding the cause helps you solve it faster. Ethernet issues usually come from:

Hardware problems: Damaged cables, loose connections, faulty ethernet ports, or broken network adapters.

Driver issues: Outdated, corrupted, or missing network adapter drivers.

Software conflicts: Windows updates that break settings, antivirus blocking connections, or VPN software causing problems.

Network settings: Wrong IP configuration, DNS issues, or disabled adapters.

ISP or router problems: Your internet provider having outages or your router needing a restart.

Quick Checks Before Troubleshooting

Start with these simple checks. They take 2 minutes and solve about 30% of ethernet problems:

Check the cable: Look at both ends of your ethernet cable. Make sure they click firmly into your computer and router. A loose cable is the most common cause.

Look at the lights: Your ethernet port should have small LED lights. If they’re off completely, the cable isn’t connected properly or the port is dead.

Try a different cable: Ethernet cables break easily, especially if they get bent or stepped on. Borrow one or use a spare to test.

Restart your computer: Simple but effective. A restart clears temporary glitches.

Check other devices: Do other devices on your network work? If nothing works, the problem is your router or ISP, not your ethernet.

Step 1: Run Windows Network Troubleshooter

Windows has a built-in tool that fixes many ethernet problems automatically. Use it first.

For Windows 11:

1. Right-click the Start button
2. Click Settings
3. Go to System, then Troubleshoot
4. Click Other troubleshooters
5. Find Network and Internet, click Run
6. Follow the on-screen instructions

For Windows 10:

1. Click Start, then Settings
2. Go to Update & Security
3. Click Troubleshoot on the left
4. Select Internet Connections
5. Click Run the troubleshooter

The troubleshooter checks your connection, resets network settings, and fixes common configuration problems. If it finds something, it’ll tell you what it fixed. If not, move to the next step.

Step 2: Restart Your Network Hardware

Your router and modem need occasional restarts. This clears their memory and re-establishes connections.

The right way to restart:

1. Unplug your modem’s power cable
2. Unplug your router’s power cable
3. Wait 30 seconds (this matters, let capacitors drain)
4. Plug the modem back in first
5. Wait until all modem lights are steady (usually 1-2 minutes)
6. Plug the router back in
7. Wait for router lights to stabilize
8. Test your ethernet connection

This power cycle fixes problems with IP assignment, router memory leaks, and connection drops.

Step 3: Update or Reinstall Network Adapter Drivers

Drivers are software that let Windows communicate with your ethernet adapter. When they’re outdated or corrupted, your connection fails.

Update your driver:

1. Press Windows + X
2. Click Device Manager
3. Expand Network adapters
4. Right-click your Ethernet adapter (usually says Realtek, Intel, or Killer)
5. Click Update driver
6. Choose Search automatically for drivers
7. Let Windows find and install updates
8. Restart your computer

If updating doesn’t work, reinstall:

1. Go back to Device Manager
2. Right-click your ethernet adapter
3. Click Uninstall device
4. Check the box for Delete the driver software
5. Click Uninstall
6. Restart your computer
7. Windows automatically reinstalls the driver

Download from manufacturer:

Sometimes Windows doesn’t have the latest driver. Go directly to your computer or motherboard manufacturer’s website:

• Dell, HP, Lenovo: Search your model number on their support site
• Custom PC: Find your motherboard model and visit the manufacturer’s site
• Look for the latest ethernet or LAN driver for Windows 11/10

Download the driver, run the installer, and restart.

Step 4: Check Network Adapter Settings

Your ethernet adapter might be disabled or configured incorrectly. Here’s how to check:

Enable the adapter:

1. Open Settings
2. Go to Network & Internet
3. Click Advanced network settings
4. Look for your Ethernet connection
5. If it says Disabled, click it and select Enable

Check adapter properties:

1. Press Windows + R
2. Type ncpa.cpl and press Enter
3. Right-click your Ethernet connection
4. Click Properties
5. Make sure these are checked:
   • Client for Microsoft Networks
   • File and Printer Sharing
   • Internet Protocol Version 4 (TCP/IPv4)
   • Internet Protocol Version 6 (TCP/IPv6)

Disable power saving:

Windows sometimes turns off your ethernet adapter to save power, breaking your connection.

1. Open Device Manager
2. Expand Network adapters
3. Right-click your ethernet adapter
4. Click Properties
5. Go to Power Management tab
6. Uncheck Allow the computer to turn off this device to save power
7. Click OK

Step 5: Reset TCP/IP Stack and Winsock

Your network configuration can get corrupted. Resetting it fixes many stubborn problems.

Reset network stack:

1. Press Windows + X
2. Click Terminal (Admin) or Command Prompt (Admin)
3. Type these commands one at a time, pressing Enter after each:

netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

4. Restart your computer

These commands clear your network configuration and request a fresh IP address from your router. This fixes DNS problems, IP conflicts, and corrupted network settings.

Step 6: Configure IP and DNS Settings

Sometimes your computer can’t get an IP address automatically. Setting it manually can help.

Set DNS to Google or Cloudflare:

1. Press Windows + R
2. Type ncpa.cpl and press Enter
3. Right-click your Ethernet connection
4. Click Properties
5. Select Internet Protocol Version 4 (TCP/IPv4)
6. Click Properties
7. Select Use the following DNS server addresses
8. Preferred DNS: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare)
9. Alternate DNS: 8.8.4.4 (Google) or 1.0.0.1 (Cloudflare)
10. Click OK

Set static IP address (if DHCP fails):

1. Follow steps 1-6 above
2. Select Use the following IP address
3. Enter these (adjust the last number to avoid conflicts):
   • IP address: 192.168.1.100
   • Subnet mask: 255.255.255.0
   • Default gateway: 192.168.1.1 (your router’s IP)
4. Click OK

Your router’s IP is usually printed on the bottom of the device or found in its manual.

Step 7: Disable VPN and Security Software Temporarily

VPNs and antivirus programs can block ethernet connections.

Test without VPN:

1. Disconnect any VPN you’re using
2. Test your ethernet connection
3. If it works, your VPN is causing the problem
4. Update the VPN app or contact their support

Disable antivirus temporarily:

1. Right-click your antivirus icon in the system tray
2. Look for Disable, Pause Protection, or similar
3. Choose to disable for 10 minutes
4. Test your connection
5. Re-enable the antivirus

If this fixes it, check your antivirus firewall settings. You may need to add an exception for your network.

Step 8: Check for Windows Updates

Microsoft releases updates that fix network bugs. An outdated Windows can cause ethernet problems.

1. Open Settings
2. Click Windows Update
3. Click Check for updates
4. Install any available updates
5. Restart your computer

Sometimes a bad Windows update causes problems. If your ethernet stopped working right after an update, you can uninstall it:

1. Go to Settings, Windows Update
2. Click Update history
3. Scroll down to Uninstall updates
4. Find the recent update
5. Click Uninstall

Step 9: Test the Ethernet Port and Cable

Hardware failure is real. Your ethernet port or cable might be physically broken.

Test the cable:

1. Use your ethernet cable on another computer
2. If it doesn’t work there either, the cable is bad
3. Buy a new Cat 5e or Cat 6 ethernet cable

Test the port:

1. Try a different ethernet port on your router
2. If you have a laptop with ethernet, try another port there
3. If no ports work with any cable, your network adapter might be dead

Check for physical damage:

• Look inside the ethernet port on your computer
• The little plastic tab should be intact
• The metal pins should be straight and even
• No bent pins, broken plastic, or debris inside

Step 10: Advanced Fixes for Persistent Issues

If nothing above worked, try these more technical solutions.

Disable IPv6:

Some networks have problems with IPv6. Turning it off can help.

1. Open ncpa.cpl from the Run dialog
2. Right-click Ethernet
3. Click Properties
4. Uncheck Internet Protocol Version 6 (TCP/IPv6)
5. Click OK
6. Restart

Change network profile:

1. Open Settings
2. Go to Network & Internet
3. Click Ethernet
4. Click your connection name
5. Under Network profile type, try switching between Public and Private

Reset network completely:

Windows 11/10 has a nuclear option that resets everything:

1. Open Settings
2. Go to Network & Internet
3. Click Advanced network settings
4. Scroll to More settings
5. Click Network reset
6. Click Reset now
7. Your computer will restart

This removes all network adapters, reinstalls them, and resets all settings to default. You’ll need to reconnect to Wi-Fi and re-enter passwords afterward.

Check BIOS settings:

Rarely, the ethernet adapter gets disabled in BIOS.

1. Restart your computer
2. Press F2, Delete, or F12 during startup (depends on manufacturer)
3. Look for Integrated Peripherals, Onboard Devices, or similar
4. Find your LAN or Network Adapter option
5. Make sure it’s Enabled
6. Save and exit

When to Replace Hardware

Sometimes your ethernet adapter is simply dead. This happens with:

• Age (components wear out after 5-10 years)
• Power surges or lightning strikes
• Physical damage from drops or spills
• Manufacturing defects

Signs you need new hardware:

Symptom	Likely Cause
No lights on ethernet port ever	Dead network adapter
Different cables and ports all fail	Dead network adapter
Works on other computers, not yours	Your ethernet port or adapter
Intermittent connection that drops constantly	Failing hardware
Physical damage visible	Damaged port

Solutions:

1. USB to Ethernet adapter (quick, $15-30)
2. PCIe network card for desktops ($20-50)
3. Replace motherboard (expensive, usually not worth it)

USB ethernet adapters work great and plug into any USB port. They’re the easiest fix for dead built-in ethernet.

Preventing Future Ethernet Problems

Keep your connection stable with these habits:

Regular maintenance:

• Update Windows monthly
• Update network drivers every 3-6 months
• Restart your router monthly
• Check cables for wear every few months

Good practices:

• Don’t bend ethernet cables sharply (damages internal wires)
• Keep cables away from heavy furniture
• Use cable clips to prevent trips and pulls
• Replace cables every 3-5 years as preventive maintenance
• Keep your computer’s vents clear (overheating can damage components)

Surge protection:

Use a surge protector for your computer and router. Power surges kill ethernet adapters. Spend $20-40 on a good surge protector to protect hundreds of dollars of equipment.

Troubleshooting Table: Quick Reference

Problem	Most Likely Fix
No internet, other devices work fine	Restart computer, update drivers
No lights on ethernet port	Check cable, try different port
Connection drops randomly	Disable power saving, update drivers
Works sometimes, fails other times	Replace cable, check for loose connection
Stopped working after Windows update	Uninstall update or reset network
Can’t get IP address	Reset TCP/IP, set DNS manually
All lights on, no internet	Check router, reset modem

Frequently Asked Questions

Why does my ethernet keep disconnecting randomly?

Random disconnections usually come from three causes: a failing ethernet cable with internal breaks, power management settings turning off your adapter, or an outdated network driver. Start by disabling power saving in Device Manager under your adapter’s properties. If that doesn’t work, replace your cable and update your driver. Loose connections at either end of the cable also cause intermittent drops.

How do I know if my ethernet port is broken?

Test with a known-good cable in a different port on your router. If other devices work with that cable but yours doesn’t, and you’ve tried multiple cables, your port is likely dead. Check for physical damage like bent pins or a broken plastic tab. No lights at all when you plug in is another strong sign of a dead port. A USB to ethernet adapter is the quickest fix.

Can I use ethernet and Wi-Fi at the same time on Windows 11/10?

Yes, Windows can use both simultaneously. By default, ethernet gets priority because it’s faster and more stable. You’ll see both connections active in your network settings. This setup works for redundancy or if you’re bridging networks, but for normal use, one connection handles your internet while the other stays ready as backup.

Why does my ethernet say no internet but Wi-Fi works?

This means your ethernet connection to the router works, but something blocks internet access through that path. Common causes include wrong DNS settings, IP configuration problems, or the router not routing ethernet traffic properly. Try setting your DNS to 8.8.8.8, release and renew your IP with ipconfig commands, or swap the ethernet cable to a different router port. The router might have a setting blocking wired connections.

How often should I replace my ethernet cable?

Replace cables when they fail or show physical damage like fraying, crushed areas, or broken clips. A cable in good condition lasts 5-10 years easily. If you’re getting random disconnections, slower speeds than expected, or intermittent connection, try a new cable before troubleshooting further. Cables are cheap and often the actual problem. Keep a spare Cat 6 cable around for quick testing.

Conclusion

Most ethernet connection problems come down to simple fixes: loose cables, outdated drivers, or network settings that need resetting. Start with the quick checks, run the Windows troubleshooter, and restart your network hardware. Those three steps solve the majority of issues.

If you’re still stuck after trying everything here, your hardware might be failing. A USB ethernet adapter costs $20 and gets you back online in minutes. Don’t spend hours fighting a dead port when a simple adapter solves it.

The key to fixing ethernet problems is working systematically. Don’t skip steps or jump to complex solutions first. Follow this guide in order, test after each change, and you’ll find your fix.