🏠 Home › Windows 11 › Ethernet Not Detecting Cable
LAN cable plugged in but Windows says “Network cable unplugged”? This issue looks like a hardware failure — but in most cases, it’s a simple fix that takes less than 2 minutes.
💬 Real case: A user told me — “My Ethernet suddenly stopped working after a Windows update. Cable is fine, router is fine, but my PC shows ‘cable unplugged’.” I asked him to reinstall the driver and disable power saving. 👉 Result: Fixed in under 3 minutes. This is exactly how most Ethernet detection issues work.
If your Ethernet cable is plugged in but Windows 11 is not detecting it, your system is failing to recognize the physical network connection. The good news? In 90% of cases, this is caused by driver issues, power settings, or network configuration — not hardware failure.
🔎 Quick Test — Hardware or Software?
- ✅ Try same cable on another device → works? → Not hardware
- ❌ No LED light on Ethernet port → Cable or port issue
- ✅ WiFi works but Ethernet doesn’t → Driver issue
- ❌ Adapter missing in Device Manager → Software issue
🔍 Why Ethernet Cable Is Not Detected?
- 🔧 Corrupted or outdated Ethernet driver
- ⚡ Power saving disables network adapter
- 💻 Windows update broke driver compatibility
- 🔌 Faulty LAN cable or router port
- 🌐 Network adapter disabled
1. Check Ethernet Cable & Port (MOST IMPORTANT)
Before touching any settings — check hardware first.
- Try another Ethernet cable
- Switch router port
- Check blinking LED near port
No light = hardware issue.
2. Restart Network Adapter
- Control Panel → Network Connections
- Disable Ethernet → Enable again
3. Update or Reinstall Ethernet Driver (BEST FIX)
- Open Device Manager
- Network Adapters → Right-click Ethernet
- Uninstall → Restart PC
👉 Also check: Ethernet Not Working Windows 11
4. Disable Power Saving on Adapter
Windows may turn off Ethernet to save power.
5. Check Device Manager (Adapter Missing?)
If adapter is missing — reinstall driver manually.
6. Reset Network Settings
Settings → Network → Network Reset
7. Disable Antivirus / Firewall
Some security tools block network detection.
8. Update Windows
Fix compatibility issues caused by updates.
9. Try USB to Ethernet Adapter
If nothing works — your LAN port may be damaged.
❓ FAQ
Why Ethernet says unplugged?
Due to driver or hardware issues.
Best fix?
Reinstall driver.
🏁 Bottom Line
Ethernet not detecting cable in Windows 11 looks like a serious issue — but it’s usually fixed by checking the cable or reinstalling the driver. Start with hardware, then move to software fixes — and you’ll be back online quickly.