You are in the middle of an important video call, a ranked game, or a large file download, and suddenly your ethernet connection drops. Again. The little network icon in your taskbar switches to a globe with a cross, and Windows tells you the ethernet cable is unplugged, even though it is sitting right there in the port.
If this sounds familiar, you are far from alone. Thousands of Windows users search every month for how to fix ethernet connection keeps disconnecting on Windows. It is one of the most frustrating networking issues because the disconnects seem random, and the temporary fix (unplugging and replugging the cable) only lasts until the next drop.
Our team has spent months digging through forum threads on ElevenForum, Reddit communities like r/techsupport and r/HomeNetworking, Microsoft Support documentation, and manufacturer forums to understand every angle of this problem. What we found is that most guides throw a list of fixes at you without explaining why each one works or how to figure out which fix applies to your specific situation.
This guide takes a different approach. We walk you through a systematic, layer-by-layer troubleshooting methodology that starts at the physical cable and works all the way up to the Windows operating system. By the end, you will not only have fixed your ethernet disconnects but also understand exactly what caused them in the first place.
Whether you are running Windows 10 or Windows 11, gaming on a desktop or working remotely on a laptop, this guide covers every scenario we have encountered.
Table of Contents
What Causes Ethernet Disconnects on Windows?
Ethernet disconnects on Windows are caused by one of five things: a faulty or loose cable, a problem with your router or network switch, an outdated or corrupted network adapter driver, aggressive power management settings that shut down your adapter, or a TCP/IP stack issue within Windows itself. Figuring out which of these is the culprit is the key to fixing the problem permanently.
The most common cause we see across forum reports is power management. Windows has a feature called Energy Efficient Ethernet (EEE) that powers down your network adapter during low traffic periods to save electricity. On some systems, especially those with Realtek controllers, the adapter fails to wake up properly, causing a disconnect that lasts anywhere from a few seconds to permanently until you replug the cable.
The second most common cause is a driver issue. Windows Update sometimes pushes a network adapter driver that is incompatible with your specific hardware, or a driver gets corrupted during a system update. This is why so many users report that ethernet disconnects started right after a Windows update.
Less common but still frequent causes include IP address conflicts on your local network, a failing network switch (especially in homes with structured ethernet wiring), and physical damage to the ethernet port or cable. We will show you how to identify each of these scenarios using diagnostic tools you already have built into Windows.
Quick Diagnostic Checklist: Identify the Root Cause in 5 Minutes
Before you start applying fixes randomly, spend five minutes running through this diagnostic checklist. These steps will tell you which layer of your network is causing the disconnects, saving you hours of trial and error.
Step 1: Check if WiFi works when ethernet drops. If your WiFi-connected devices stay online while your ethernet-connected PC drops, the problem is isolated to your PC, cable, or the specific port on your router. If WiFi also drops, the issue is with your modem, router, or ISP.
Step 2: Open Device Manager and look for error codes. Press Windows Key + X and select Device Manager. Expand Network adapters and look for a yellow triangle next to your ethernet adapter. If you see one, right-click it, select Properties, and check the error code under the General tab. Code 43 means a driver problem, Code 10 means the device cannot start, and Code 31 means the driver is not working correctly.
Step 3: Run a continuous ping test. Open Command Prompt and type ping -t 192.168.1.1 (replace with your actual gateway IP, which you can find by typing ipconfig). Watch the ping results. If pings to your gateway start timing out, the problem is between your PC and your router. If pings to your gateway are fine but pings to 8.8.8.8 time out, the problem is between your router and the internet.
Step 4: Check Event Viewer for disconnect timestamps. Press Windows Key, type Event Viewer, and press Enter. Navigate to Windows Logs then System. Look for events from sources like “e1x” or “Realtek” or “NetBT” around the time your disconnects happen. This will often tell you exactly what Windows was doing when the connection dropped.
Step 5: Note the pattern. Do disconnects happen every few seconds, every few minutes, or once an hour? Do they happen during heavy usage like gaming or downloads, or during idle periods? Disconnects during idle periods almost always point to power management. Disconnects during heavy usage often point to a driver or thermal issue.
Fix 1: Check and Reseat Your Ethernet Cable
The simplest fix is often the most overlooked. A loose, damaged, or low-quality ethernet cable is one of the most common causes of random disconnects. The connector on an ethernet cable (RJ45) has a small plastic tab that wears down over time, causing the cable to sit loosely in the port and lose connection when the desk vibrates or the cable shifts.
Start by unplugging the cable from both ends and inspecting it. Look for kinks, sharp bends, crushed sections, or exposed wires. If the cable runs along the floor or under a carpet, check for physical damage where it might have been stepped on repeatedly. Even a tiny break in the internal wires can cause intermittent disconnects that are nearly impossible to diagnose visually.
When you replug the cable, listen for a firm click. That click means the plastic tab has engaged properly. If you do not hear a click, or if the cable pulls out with almost no resistance, the tab is worn down. You can temporarily fix this by putting a small amount of tape on top of the connector to add friction, but you should replace the cable.
We recommend swapping in a known-good cable as a test. If the disconnects stop with the new cable, your old cable was the problem. Stick with Cat5e or Cat6 cables from reputable brands. Avoid ultra-flat cables for runs longer than 10 feet, as they have less shielding and are more susceptible to interference.
Also check the ethernet port on your PC. Shine a flashlight into the port and look for bent or damaged pins. If any pins are bent, the port may need to be repaired or the network card replaced.
Fix 2: Restart Your Modem, Router, and Network Switch
Network devices build up temporary issues over time. DHCP lease tables get corrupted, NAT tables overflow, and firmware bugs cause ports to silently fail. A simple restart clears all of these temporary states and is often the fastest way to resolve ethernet disconnects that are caused by your router rather than your PC.
Here is the correct restart sequence. Unplug the power from your modem first, then unplug your router, then unplug any network switches. Wait at least 30 seconds. Plug the modem back in first and wait for it to fully connect to your ISP (this can take 2 to 5 minutes). Then plug in your router and wait for it to fully boot. Finally, plug in your switches.
While you are at it, check that your ethernet cable is plugged into the correct port on your router. Some routers have a dedicated WAN port and LAN ports. Plugging into the wrong port type can cause intermittent connectivity issues that look like random disconnects.
Network Switch Troubleshooting (Whole-House Ethernet)
If you have a home with structured ethernet wiring running through the walls to multiple rooms, you likely have one or more network switches distributing the connection. A failing network switch is an under-diagnosed cause of ethernet disconnects that almost no troubleshooting guide mentions.
One ElevenForum user documented months of troubleshooting only to discover that one of the six network switches in their home was intermittently failing. Resetting that switch resolved the problem entirely. If you have switches in your network setup, power cycle each one individually. If the disconnects stop after cycling a particular switch, that switch is likely failing and should be replaced.
Also check for IP conflicts on your network. If two devices are assigned the same IP address, both will experience intermittent disconnects as they fight over the address. You can resolve this by setting up a MAC-IP reservation table in your router, which ensures every device always gets the same IP address. We cover this in detail in the advanced troubleshooting section below.
Fix 3: Update or Reinstall Your Network Adapter Driver
An outdated, corrupted, or incompatible network adapter driver is the second most common cause of ethernet disconnects on Windows. Windows Update is notorious for pushing generic drivers that do not play well with specific hardware, especially Realtek ethernet controllers.
To update your driver, open Device Manager by pressing Windows Key + X and selecting Device Manager. Expand Network adapters, right-click your ethernet adapter, and select Update driver. Choose “Search automatically for drivers” first. If Windows finds an update, install it and restart your PC.
However, the automatic search often fails to find the latest driver. For the most reliable update, go directly to your motherboard manufacturer’s website or the network chip manufacturer’s website. If you have a Realtek controller (which most users do), download the driver directly from Realtek’s official website. If you have an Intel controller, get it from Intel’s support page.
The Clean Reinstall Method
If updating does not fix the issue, do a clean reinstall. In Device Manager, right-click your ethernet adapter and select Uninstall device. Check the box that says “Delete the driver software for this device” if it appears. Click Uninstall, then restart your PC.
After the restart, Windows will install a generic driver automatically. Test your connection with this generic driver for a day. If the disconnects stop, the problem was your previous driver. You can then install the latest manufacturer driver and test again. If the disconnects return after installing the manufacturer driver, stick with the Windows generic driver until a newer version is released.
Realtek-Specific Driver Settings
Realtek ethernet controllers are the most common in consumer PCs, and they have specific advanced settings that cause disconnects when configured incorrectly. After updating your driver, right-click your Realtek ethernet adapter in Device Manager, select Properties, and click the Advanced tab.
Here are the settings we recommend changing based on forum reports and manufacturer documentation:
Disable Energy Efficient Ethernet (also called Green Ethernet or Advanced EEE). This is the single most effective Realtek-specific fix. Select it in the Advanced tab and set the value to Disabled. This prevents the adapter from entering low-power mode during idle periods, which is the root cause of most random disconnects.
Disable Wake on Magic Packet. This feature allows the PC to be woken from sleep by a network signal, but it can cause the adapter to cycle its link state. Set it to Disabled unless you specifically need it for remote wake-on-LAN.
Set Speed and Duplex to a fixed value. By default, this is set to Auto Negotiation. Change it to the highest fixed speed your setup supports, such as 1.0 Gbps Full Duplex. Auto Negotiation can cause brief link drops when the adapter and switch periodically re-negotiate the connection speed.
Disable Interrupt Moderation. This setting batches network interrupts to reduce CPU usage, but on some Realtek controllers it causes delayed packet processing that looks like a disconnect during heavy traffic. Set it to Disabled.
Check for VLAN and Priority settings. If you see settings called “Priority and VLAN” or “Large Send Offload,” try disabling them. These offloading features are known to cause instability on certain driver versions.
Fix 4: Disable Power Saving Features
Windows aggressively manages power to reduce electricity consumption, and your network adapter is a prime target. When Windows decides your network traffic is low enough, it tells the adapter to enter a low-power state. The problem is that many adapters fail to wake up from this state correctly, resulting in a disconnect that requires a physical replug or a driver reset to fix.
There are three power-related settings you need to disable to prevent this from happening. Do all three, because they interact with each other.
Disable Power Management for the Network Adapter
Open Device Manager, right-click your ethernet adapter, and select Properties. Go to the Power Management tab. Uncheck the box that says “Allow the computer to turn off this device to save power.” Also uncheck “Allow this device to wake the computer” if it is checked.
Click OK and restart your PC. This setting alone resolves disconnects for a large percentage of users. The Power Management tab may not appear on some systems, particularly with newer drivers. If you do not see it, move on to the next two settings.
Disable Fast Startup
Fast Startup is a Windows feature that saves part of the system state to speed up boot times. However, it can prevent drivers from loading cleanly, and network drivers are particularly susceptible. Many users report that disabling Fast Startup eliminated their ethernet disconnects entirely.
Press Windows Key, type Control Panel, and press Enter. Go to Power Options (you may need to change the view to Large Icons first). Click “Choose what the power buttons do” on the left side. Click “Change settings that are currently unavailable” at the top. Uncheck “Turn on fast startup (recommended).” Save changes and restart your PC.
Disable Energy Efficient Ethernet in Windows Settings
In addition to disabling EEE in the adapter Advanced tab (as described in the Realtek section above), you should also check Windows power settings. Press Windows Key + I to open Settings. Go to System then Power and battery (or just Power on Windows 10). If you see any power mode options, set them to Balanced rather than Power Saver. Power Saver mode can override your adapter settings and re-enable power throttling.
On some systems, you can also access the Network Adapter Power Settings by typing powercfg.cpl in the Run dialog, clicking Change plan settings, then Change advanced power settings. Expand Wireless Adapter Settings and then Power Saving Mode. Even though this is labeled for wireless adapters, on some systems it affects wired adapters too. Set it to Maximum Performance.
Fix 5: Run Network Command-Line Resets
Sometimes the problem is not with your hardware or drivers but with the Windows networking stack itself. The TCP/IP stack, the Winsock catalog, and the DNS resolver cache can all become corrupted over time, especially after installing VPN software, virtual machine platforms, or network monitoring tools.
Running a sequence of network reset commands clears these corruptions and resets Windows networking to a clean state. This is one of the most effective fixes for disconnects that started after a Windows update or after installing new software.
Open Command Prompt as Administrator. You must run it as administrator, or the commands will fail. Press Windows Key, type cmd, right-click Command Prompt, and select Run as administrator.
Run each of these commands in order, pressing Enter after each one:
netsh winsock reset — This resets the Winsock catalog, which manages how Windows applications access network services. Corruptions here are a common cause of intermittent disconnects.
netsh int ip reset — This resets the TCP/IP stack to its original state. It rewrites registry keys related to TCP/IP, which can fix deep networking issues that other methods cannot reach.
ipconfig /flushdns — This clears the DNS resolver cache. A corrupted cache can cause apparent disconnects because Windows fails to resolve domain names even though the underlying connection is fine.
ipconfig /release — This releases your current IP address.
ipconfig /renew — This requests a new IP address from your router’s DHCP server.
After running all five commands, restart your PC. Do not just log out and log back in. A full restart is required for the Winsock and TCP/IP resets to take effect.
These commands are safe to run and will not delete any personal files or settings. They only reset networking components. However, if you use VPN software or virtual machine software like VMware or Hyper-V, you may need to reconfigure network adapters for those programs afterward.
Fix 6: Change Your DNS Servers
Your DNS resolver is responsible for translating human-readable domain names like google.com into IP addresses that computers use to communicate. By default, your DNS servers are assigned by your ISP through DHCP. ISP DNS servers are often slow, unreliable, or overloaded, which can cause apparent network disconnects even though your physical connection is fine.
Switching to a fast, reliable public DNS server can eliminate disconnects that are actually DNS resolution failures rather than true network drops. The two most popular options are Google DNS and Cloudflare DNS.
To change your DNS servers, press Windows Key + I to open Settings. Go to Network and Internet then Ethernet (or Status then Properties on Windows 10). Click your ethernet connection, then scroll to DNS server assignment and click Edit. Change the setting from Automatic to Manual. Toggle IPv4 on.
For Google DNS, enter 8.8.8.8 as the preferred DNS server and 8.8.4.4 as the alternate. For Cloudflare DNS, enter 1.1.1.1 as preferred and 1.0.0.1 as alternate. Save your changes and restart your browser.
You can test if DNS was the problem by opening Command Prompt and typing nslookup google.com. If the response is fast and returns correct IP addresses, your new DNS is working. If disconnects continue after changing DNS, the problem is elsewhere in your network stack.
Fix 7: Check for Windows Updates (or Roll Back)
Windows updates are a double-edged sword for ethernet stability. Sometimes a Windows update includes a fix for a known network adapter bug, and installing it resolves your disconnects. Other times, a Windows update introduces a new driver or networking change that causes disconnects to start.
Check for updates first. Press Windows Key + I, go to Windows Update, and click Check for updates. Install any available updates and restart your PC. If the updates include a network adapter driver update, test your connection afterward.
If your disconnects started right after a Windows update, you should roll back the update. Go to Windows Update, click Update history, then scroll down and click Uninstall updates. Find the update that was installed around the time your disconnects started and click Uninstall.
For driver-specific rollbacks, open Device Manager, right-click your ethernet adapter, and select Properties. Go to the Driver tab and click Roll Back Driver. This restores the previous driver version. If the Roll Back button is grayed out, there is no previous driver to restore, and you will need to manually download and install an older driver from the manufacturer’s website.
One pattern we see frequently on ElevenForum and Reddit is that consecutive daily Windows updates (cumulative updates pushed on back-to-back days) can corrupt Realtek driver installations. If this happens, use the clean reinstall method from Fix 3 after rolling back the Windows update.
Fix 8: Perform a Full Network Reset
If none of the previous fixes have worked, Windows has a nuclear option called Network Reset. This removes and reinstall all network adapters and resets all networking components to their factory defaults. It is the most thorough software-level fix available.
Be aware that Network Reset will remove all saved WiFi passwords, reset your VPN configurations, and may change your network profile from Private to Public. You will need to re-enter WiFi passwords and reconfigure VPN software afterward.
To perform a Network Reset, press Windows Key + I to open Settings. Go to Network and Internet, then scroll to the bottom and click Advanced network settings (or Status then Network reset on Windows 10). Click Network reset and then Reset now. Confirm the action.
Windows will warn you that your PC will restart in five minutes. Let it restart. After the restart, Windows will reinstall your network adapter drivers from scratch. You will need to reconnect to your network and reconfigure any custom settings you had.
Test your connection for a full day after the reset. If disconnects continue after a full Network Reset, the problem is almost certainly hardware-related rather than software-related. Move on to the hardware diagnosis section below.
How to Diagnose: Software vs Hardware Problem
One of the most common questions on tech support forums is whether ethernet disconnects are caused by software or hardware. The answer determines your entire troubleshooting strategy, so it is worth taking the time to isolate the problem correctly.
Here is the systematic approach we recommend, based on the same methodology used by IT professionals and network engineers.
Test With a USB to Ethernet Adapter
The single most reliable way to isolate hardware from software is to bypass your built-in ethernet port entirely using a USB to Ethernet adapter. Plug a USB to Ethernet adapter into a USB port on your PC, connect your ethernet cable to the adapter, and test the connection.
If the disconnects stop with the USB adapter, your motherboard’s ethernet port or the built-in network controller chip is failing. This is a hardware problem that requires either replacing the network card or using the USB adapter permanently.
If the disconnects continue with the USB adapter, the problem is not with your ethernet port. It is either a software issue in Windows, a problem with your cable, or an issue with your router or switch.
How to Tell if Your Ethernet Port Is Fried
There are several signs that indicate a physically damaged ethernet port. If you see any of these, the port needs to be repaired or replaced.
First, look at the link lights on the port. Most ethernet ports have two small LEDs next to the connector. One shows link status (solid when connected) and the other shows activity (flashing during data transfer). If neither light illuminates when a cable is plugged in, the port may be dead.
Second, try the same cable and port on a different device. If a laptop connects fine through the same cable to the same router port, but your desktop does not, your desktop’s ethernet port is likely the problem.
Third, check for physical damage. Bent pins inside the port, a loose connector that wiggles excessively, or burn marks around the port all indicate hardware failure.
If your port is fried, you have two options. You can install a PCIe network card (a dedicated ethernet card that plugs into a PCIe slot on your motherboard) or use a USB to Ethernet adapter. PCIe cards are more reliable and offer better performance for gaming and heavy traffic.
IP Conflict and Static IP Troubleshooting
An IP conflict occurs when two devices on the same network are assigned the same IP address. When this happens, both devices experience intermittent disconnects as they compete for the address. This is especially common in networks with many devices or networks where devices are frequently added and removed.
To check for IP conflicts, open Command Prompt and type ipconfig /all. Note your IPv4 address. Then go to another device on the same network and check its IP address. If two devices share the same IP, you have a conflict.
The fix is to assign a static IP to your PC that is outside your router’s DHCP pool. First, find your router’s DHCP range by logging into your router’s admin panel (usually 192.168.1.1 or 192.168.0.1). The DHCP pool is typically something like 192.168.1.100 to 192.168.1.200. Pick an address outside this range, like 192.168.1.50, and assign it statically to your PC.
To set a static IP on Windows, go to Settings then Network and Internet then Ethernet. Click your ethernet connection, then scroll to IP assignment and click Edit. Change it from Automatic to Manual, toggle IPv4 on, and enter your chosen IP address, subnet mask (255.255.255.0), gateway (your router’s IP), and DNS servers.
For a more robust solution, set up MAC-IP reservations in your router. This tells your router to always assign the same IP to a specific device based on its MAC address, eliminating conflicts entirely without requiring static IP configuration on each device.
Gaming-Specific Ethernet Disconnect Fixes
Ethernet disconnects during gaming are a specific subset of the problem that deserve their own section. Gamers are hit hardest by disconnects because even a two-second drop can mean getting kicked from a match, losing progress, or taking a loss in a ranked game.
If your ethernet disconnects only during gaming but is stable during normal browsing and work, the issue is likely related to high traffic volumes, packet bursts, or GPU driver interference.
First, check if your disconnects coincide with high GPU usage. One Reddit user with an ASUS motherboard and Nvidia GPU discovered that the Edge browser was causing GPU throttling that produced symptoms identical to network disconnects. The fix was to update chipset drivers and disable hardware acceleration in the browser. Check your GPU drivers and update them if needed.
Second, try disabling interrupt moderation on your network adapter (as described in Fix 3). During gaming, packet timing is critical. Interrupt moderation batches packets together to reduce CPU load, but this can cause brief delays that some games interpret as disconnects.
Third, check your router’s QoS (Quality of Service) settings. Some routers prioritize traffic poorly, causing game packets to be delayed when other devices on the network are streaming or downloading. Enable QoS and set your gaming PC to highest priority.
Fourth, if you are using a Realtek 2.5GbE controller (common on newer gaming motherboards), make sure you are running the latest driver directly from Realtek, not the Windows Update version. The Windows Update Realtek 2.5GbE driver has documented issues with disconnects during high-throughput gaming traffic.
Finally, monitor your temperatures. A network controller chip that overheats during sustained high traffic will throttle or disconnect. If your PC runs hot during gaming, improving airflow or adding a fan near the network card can help.
Advanced Troubleshooting: Event Viewer and Ping Diagnostics
If you have tried all the standard fixes and your ethernet still disconnects, it is time to dig into Windows diagnostic logs. No competitor guide covers this, but it is the most powerful way to pinpoint exactly which layer of your network is failing.
Using Event Viewer to Find Disconnect Timestamps
Event Viewer records every significant system event with a timestamp, including network state changes. By correlating disconnect times with specific event log entries, you can often identify the exact cause.
Open Event Viewer by pressing Windows Key and typing Event Viewer. Navigate to Windows Logs then System. Click Filter Current Log on the right side and set the Event sources to include “e1xexpr,” “Realtek,” “TCPIP,” “Dhcp-Client,” and “NetBT.” Set the time range to cover when your last disconnect occurred.
Look for warning or error events that coincide with your disconnect times. Common entries include:
Event ID 4202 from the wireless or wired adapter source indicates that the adapter was reset. This points to a power management issue or driver crash.
Event ID 4201 indicates that the adapter was initialized, meaning it had previously been shut down or disconnected.
Event ID 4199 from Tcpip indicates an IP address conflict was detected. This confirms an IP conflict on your network.
Event ID 1003 from Dhcp-Client indicates that the PC could not reach the DHCP server to renew its IP address. This points to a router or switch problem.
Write down the event IDs you find and their timestamps. This information is extremely valuable for identifying patterns.
Using Ping to Diagnose Which Layer Is Failing
A systematic ping test can tell you exactly where in your network the connection is breaking. Open Command Prompt and run three simultaneous continuous pings.
In the first window, type ping -t 127.0.0.1 — this pings your own network adapter’s loopback address. If this fails, your network adapter hardware or driver is failing.
In the second window, type ping -t 192.168.1.1 (replace with your gateway IP) — this pings your router. If the loopback ping is fine but the gateway ping drops, the problem is between your PC and your router (cable, port, or switch).
In the third window, type ping -t 8.8.8.8 — this pings Google’s DNS server on the internet. If the gateway ping is fine but the 8.8.8.8 ping drops, the problem is between your router and the internet (modem, ISP, or router WAN connection).
Let all three pings run for 30 minutes or until a disconnect occurs. When a disconnect happens, immediately check which pings failed:
All three failed means your PC’s network adapter is the problem. Focus on driver and hardware fixes.
Only gateway and internet pings failed means your local connection dropped. Focus on cable, port, and switch fixes.
Only the internet ping failed means your router or modem lost its internet connection. Focus on router and modem restarts and ISP troubleshooting.
This diagnostic method eliminates guesswork and tells you exactly where to focus your troubleshooting effort. It is the single most underused technique for ethernet disconnect problems.
FAQ’s
Why is my PC randomly disconnecting from Ethernet?
Random ethernet disconnects are most commonly caused by power management settings (Energy Efficient Ethernet and adapter power-down), outdated or corrupted network adapter drivers, a faulty ethernet cable, IP address conflicts on your network, or a failing network switch. Start by disabling power management for your network adapter in Device Manager, then check your cable and update your driver.
How to tell if an Ethernet port is fried?
Check the link lights next to the ethernet port. If neither LED illuminates when a cable is plugged in, the port may be dead. Test the same cable on a different device or test a USB to Ethernet adapter on your PC. If the USB adapter works but your built-in port does not, the port is likely fried and needs replacement via a PCIe network card or USB adapter.
Why does my Ethernet keep disconnecting and reconnecting Windows 11?
On Windows 11, ethernet disconnects are frequently caused by Energy Efficient Ethernet, Fast Startup interference, or Windows Update pushing an incompatible Realtek driver. Disable Energy Efficient Ethernet in Device Manager under the adapter Advanced tab, turn off Fast Startup in Power Options, and do a clean driver reinstall from the manufacturer website rather than relying on Windows Update.
How to fix Ethernet disconnected?
To fix an ethernet disconnection, work through these steps in order: 1) Unplug and replug the ethernet cable firmly at both ends. 2) Restart your modem, router, and any network switches. 3) Disable Energy Efficient Ethernet and adapter power management in Device Manager. 4) Update or reinstall your network adapter driver. 5) Run netsh winsock reset and ipconfig flushdns in Command Prompt. 6) Perform a full Network Reset in Windows Settings as a last resort.
Conclusion
Learning how to fix ethernet connection keeps disconnecting on Windows comes down to a systematic approach: start at the physical layer with cables and ports, move to your router and switches, then work through driver and power management settings, and finally reset the Windows networking stack. The diagnostic checklist and ping test method we shared will tell you exactly which layer is failing so you can apply the right fix instead of guessing.
Apply one fix at a time, reboot between each fix, and test thoroughly before moving on to the next. This methodical approach ensures you know exactly which fix resolved your issue and helps you avoid unnecessary changes to your system.