Why Your Ethernet Keeps Dropping on Windows 11 (And What Actually Works)

You're in the middle of a game or a video call, and suddenly your ethernet icon shows a yellow triangle. Your connection drops for a few seconds, then comes back. If that happens often, it's almost always one of three things: power saving, a bad driver, or a loose cable. I've fixed this dozens of times on Windows 11 machines, and this order works.

1. Windows 11's Power Saving Is Shutting Down Your Adapter

This is the number one cause. Windows has a feature that lets your network adapter go into a low-power state to save battery or electricity. On a desktop, that's useless—you don't need battery savings. And it often wakes up at the wrong time, causing a disconnect.

Here's how to turn it off:

1. Press Windows + X and select Device Manager.
2. Expand Network adapters. Look for your ethernet device—something like Realtek PCIe GbE Family Controller or Intel Ethernet Connection.
3. Right-click on it and choose Properties.
4. Go to the Power Management tab.
5. There's a checkbox that says Allow the computer to turn off this device to save power.
6. Uncheck it. Yes, that one.
7. Click OK.

After you click OK, you might not see anything happen immediately. That's normal. The change takes effect on the next disconnect attempt. But here's the catch: some drivers have extra power settings hidden in the advanced tab. If you still get drops, let's dig deeper.

Turn Off the Advanced Power Saving Options (If the Basic Fix Didn't Work)

Go back to Device Manager, open your adapter's Properties again, and click the Advanced tab. In the list, look for these entries:

• Energy Efficient Ethernet – set to Disabled.
• Green Ethernet – set to Disabled.
• Power Saving Mode – set to Disabled or Maximum Performance (the exact wording varies).

Also, check the Wake on Magic Packet and Wake on Pattern Match settings. You can leave them as is, but if you see anything labeled Power Saving, turn it off.

After changing these, you need to restart your computer for the settings to fully apply. You'll see the network icon disappear during restart and come back. If the drops stop, you're done. If not, move on to the next cause.

2. Your Ethernet Driver Is Outdated or Corrupt

Drivers are the second biggest culprit. Windows 11 updates in the background, and sometimes it installs a buggy driver. Or you've got a driver from 2019 that just doesn't play nice with the latest Windows update.

The quickest fix is to reinstall the driver—not just update it, but fully remove and reinstall. Here's what I do:

1. Open Device Manager again.
2. Right-click your ethernet adapter and select Uninstall device.
3. Check the box that says Delete the driver software for this device if it appears. If it doesn't show, that's okay.
4. Click Uninstall.

Now, don't panic. Your network will disappear for a moment. That's expected. After the uninstall completes, restart your PC. Windows will automatically detect the missing driver and install a fresh copy from its own database.

But here's the thing: that fresh copy might still be the same buggy one. So the safer route is to go to your motherboard manufacturer's website and download the official ethernet driver. For example, if you have an ASUS motherboard, go to ASUS support, enter your model, and grab the LAN driver. Realtek and Intel both have their own driver pages too, but the motherboard-specific one is usually more stable.

After installing the new driver, restart again. Then test your connection. If you're still getting drops, there's one more thing to try.

Use the Windows Built-in Network Reset

This is a last resort for drivers, but it often works. Go to Settings > Network & internet > Advanced network settings > Network reset. Click Reset now. Windows will uninstall and reinstall all network drivers and reset your network stack. It also forgets your Wi-Fi passwords, so be ready for that.

After the reset, your PC restarts. This takes a few minutes, and your ethernet might be down during that time. But once it's back, you have a clean slate.

3. It's Physical: Your Cable or Port Is Loose

People forget this one, but it's common. You have an old cable that's slightly bent, or the connector isn't fully seated. The connection drops when you bump the desk or the room gets warmer and things expand.

First, unplug both ends of the cable—from your PC and from the wall or router. Check the little plastic clip on the connector. If it's broken, the cable will wiggle loose on its own. You can try a different ethernet port on your router, if you have one.

Then, plug it back in firmly. You should hear a click. That click is the clip engaging—if you don't hear it, it's not in all the way.

Also, look at the cable itself. If it's crushed under a desk leg or bent sharply, replace it. Cat5e or Cat6 cables are cheap. Spending $8 on a new cable beats dealing with random drops for months.

And one more thing: if you're using a wall-mounted ethernet jack, check that too. Those can go bad. I've seen wall plates with loose wires that cause intermittent drops.

Quick Reference Summary

Try these in that order. The power saving fix alone resolves most cases. If you've done all three and still have drops, you might have a faulty network card. Test with a USB ethernet adapter—if that works, your built-in port is dying.