Your internet keeps disconnecting at the worst moments — during video calls, while streaming, or right in the middle of an important upload. Random internet disconnections on Windows 11 are one of the most frustrating problems a PC user can face, because the cause is rarely obvious. It could be your router, your adapter driver, a Windows setting, interference from neighboring WiFi networks, or even a physical cable problem.
This guide diagnoses the exact cause of your internet disconnections with a quick flowchart, then walks you through 14 proven fixes in order from fastest to most involved. Work through them in sequence — most users find their fix within the first five methods.
Quick Diagnosis: Where Is the Problem?
Disconnect Diagnosis Flowchart
Fix 1: Restart Your Router and Modem (Do It Right)
The most common cause of internet that keeps disconnecting is a router or modem that has developed a memory leak, overheated, or accumulated a corrupted DHCP table over weeks of continuous operation. A proper restart — not just a quick power cycle — clears these issues. Many users "restart" their router but do not wait long enough for a proper reset.
Unplug Both Devices Completely
Unplug the power cable from your modem first, then from your router (if you have separate devices). Do not use the power button — physically unplug from the wall.
Wait a Full 60 Seconds
This is critical. Most people wait 10 seconds. Wait a full 60 seconds to allow all capacitors to discharge and the DHCP table to fully clear from memory.
Power On in the Correct Order
Plug in the modem first and wait 30 seconds for it to fully connect to your ISP. Then plug in the router and wait another 30 seconds before connecting your Windows 11 PC.
Schedule Regular Router Restarts
Many routers have a built-in scheduler to automatically restart once a week (usually in the middle of the night). This prevents gradual performance degradation and the internet disconnection issues that accompany it. Check your router's admin panel (typically 192.168.1.1 or 192.168.0.1) for a "Reboot Scheduler" or "Scheduled Maintenance" option.
Fix 2: Forget and Reconnect to Your WiFi Network
When WiFi credentials or network configuration become corrupted in Windows, the connection appears active but drops repeatedly. Forgetting the network and reconnecting with a fresh configuration resolves this type of internet disconnection quickly.
Forget the Network
Go to Settings → Network & internet → WiFi → Manage known networks. Find your network name, click it, and select Forget.
Reconnect with Fresh Credentials
Click the WiFi icon in the system tray, find your network, click Connect, and enter your WiFi password again. Windows will create a completely fresh connection profile without any corrupted settings.
Fix 3: Run the Network Troubleshooter
Windows 11 includes an automated network troubleshooter that can detect and automatically fix common causes of internet disconnections, including incorrect TCP/IP settings, DNS configuration errors, and adapter issues. Run it first before making manual changes.
Launch the Troubleshooter
Go to Settings → System → Troubleshoot → Other troubleshooters. Find Internet Connections and click Run. Follow the on-screen prompts.
Also Run Network Adapter Troubleshooter
On the same page, also run the Network Adapter troubleshooter, which specifically checks your WiFi and Ethernet adapters for configuration problems that could be causing your internet to disconnect.
Fix 4: Reset TCP/IP Stack and Winsock
The TCP/IP stack is the foundational networking layer in Windows that handles all internet communications. When it becomes corrupted — often after malware removal, a failed update, or a VPN uninstall — your internet disconnects randomly and unpredictably. Resetting it with these commands rebuilds the stack completely and resolves the disconnection in many cases.
Open Administrator Command Prompt
Press Win + S, type cmd, right-click Command Prompt, and select Run as administrator.
Run All Reset Commands
Type each command below and press Enter after each one:
netsh winsock reset
netsh int ip reset
netsh int ipv4 reset
netsh int ipv6 reset
Restart Your Computer
These changes require a full restart to take effect. After rebooting, test whether the internet disconnections have stopped. This fix resolves random disconnections for a significant number of Windows 11 users.
Fix 5: Flush DNS Cache
A corrupted or outdated DNS cache can cause websites and services to become unreachable even when your network adapter shows as connected, creating the appearance of an internet disconnection. Flushing DNS forces Windows to retrieve fresh DNS records.
Open Administrator Command Prompt
As in Fix 4: Win + S → cmd → Run as administrator.
Flush and Renew DNS
Run these commands in sequence:
ipconfig /flushdns
ipconfig /registerdns
ipconfig /release
ipconfig /renew
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Fix 6: Update Your Network Adapter Driver
An outdated, corrupted, or incompatible network adapter driver is one of the most frequent software causes of internet that keeps disconnecting on Windows 11. Windows Update sometimes installs older generic drivers that do not work correctly with specific hardware. Downloading the driver directly from the manufacturer almost always provides better stability.
Open Device Manager
Press Win + X and click Device Manager. Expand Network adapters.
Identify Your Network Adapter
Note the exact name of your WiFi or Ethernet adapter (e.g., "Intel Wi-Fi 6E AX210" or "Realtek PCIe GbE Family Controller").
Download the Latest Driver from the Manufacturer
Visit the manufacturer's website directly: Intel (intel.com/content/www/us/en/download), Realtek (realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express), or Qualcomm/Atheros. Download the latest driver for your specific adapter model.
Install and Reboot
Run the installer, follow the prompts, and reboot when finished. If the driver installer does not offer a reboot prompt, manually restart Windows to activate the new driver.
Fix 7: Disable Power Management for Your Network Adapter
This fix resolves the most common cause of internet disconnecting randomly on Windows 11 laptops and desktops. Windows power management is designed to save energy by putting the network adapter to "sleep" during periods of low activity. When a connection request comes in before the adapter fully wakes up, the connection drops. Disabling this setting keeps the adapter always active.
Open Device Manager
Press Win + X → Device Manager → expand Network adapters.
Open Adapter Properties
Right-click your WiFi or Ethernet adapter and choose Properties. Click the Power Management tab.
Uncheck Power Saving Option
Uncheck "Allow the computer to turn off this device to save power". Click OK. Also do this for any other network adapters listed (including Ethernet if you have it).
Also Disable Advanced Power Settings
Back in the adapter's Properties window, go to the Advanced tab. Look for settings like "Power Management," "Wake on Magic Packet," and "Energy Efficient Ethernet" — set these all to Disabled for maximum connection stability.
This Fix Works for Most Laptop Users
Disabling adapter power management resolves internet disconnections for the majority of Windows 11 laptop users whose internet keeps disconnecting after the computer has been idle for a few minutes. If your internet drops specifically after you stop using the computer for 5-15 minutes, this is your fix.
Fix 8: Change DNS Servers to Google or Cloudflare
Your ISP's default DNS servers are sometimes slow, unreliable, or experiencing outages that cause websites to fail to load even when your network adapter shows connected — creating the symptoms of internet disconnecting. Switching to Google DNS (8.8.8.8) or Cloudflare DNS (1.1.1.1) uses faster, more reliable infrastructure and often fixes intermittent connectivity issues.
Open Network Adapter Settings
Go to Settings → Network & internet → WiFi (or Ethernet) → Hardware properties. Find DNS server assignment and click Edit.
Enter New DNS Servers
Change the dropdown from Automatic (DHCP) to Manual. Enable IPv4 and enter:
Preferred DNS: 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google)
Alternate DNS: 1.0.0.1 (Cloudflare) or 8.8.4.4 (Google)
Click Save.
Fix 9: Disable WiFi Sense
WiFi Sense is a Windows feature that automatically connects to networks suggested by your contacts and open hotspots. It can interfere with your primary connection by attempting to switch networks or by modifying connection priorities. Disabling it removes a potential source of random internet disconnections.
Open WiFi Settings
Go to Settings → Network & internet → WiFi → WiFi settings (or "Manage WiFi settings" on some Windows 11 versions).
Disable All WiFi Sense Options
Turn off "Connect to suggested open hotspots" and "Connect to networks shared by my contacts". These options should both be toggled off.
Fix 10: Change Your WiFi Channel
In dense urban and suburban areas, neighboring WiFi networks compete for the same wireless channels. When dozens of networks are all broadcasting on channel 6 (the default for most routers), interference causes exactly the kind of random internet disconnections that are hard to trace. Switching to a less crowded channel eliminates this interference.
Find Your Least-Congested Channel
Download WiFi Analyzer (free, Microsoft Store) on your Windows 11 PC. It shows all nearby WiFi networks and which channels they are using. Identify the least-crowded channel in your area.
Log Into Your Router Admin Panel
Open a browser and navigate to 192.168.1.1 or 192.168.0.1 (or check the label on your router for its IP). Log in with your admin credentials (often printed on the router label).
Change the WiFi Channel
Find Wireless Settings or WiFi Advanced Settings. Change the 2.4 GHz channel to 1, 6, or 11 (the only non-overlapping channels on 2.4 GHz). For 5 GHz, try channels 36, 40, 44, or 48. Save and allow the router to restart.
Fix 11: Update Your Router Firmware
Router manufacturers release firmware updates that fix bugs causing intermittent disconnections, improve compatibility with new devices, and patch security vulnerabilities. A router running outdated firmware is a very common cause of internet that keeps disconnecting — especially if the disconnections affect all devices on your network, not just your Windows 11 PC.
Log Into Your Router Admin Panel
Open a browser and navigate to your router's IP address (usually 192.168.1.1 or 192.168.0.1).
Find Firmware Update Option
Look for Administration, Advanced, System, or Maintenance sections. Find Firmware Update or Router Update. Many modern routers can check for and install updates automatically. Click Check for Update.
Install and Wait
If an update is available, install it. The router will restart — this takes 2–5 minutes. Do not unplug the router during firmware installation, as this can permanently damage the device.
Fix 12: Check for Wireless Interference Sources
Several common household devices operate on the same 2.4 GHz frequency as WiFi and can cause random internet disconnections by interfering with your signal. If your internet keeps disconnecting and you notice it correlates with using certain appliances, interference is likely the cause.
Common interference sources that cause internet disconnections:
- Microwave ovens — operate at 2.4 GHz and cause disconnections when running
- Baby monitors — older analog models broadcast at 2.4 GHz continuously
- Cordless phones — DECT phones on 2.4 GHz band
- Bluetooth devices — Bluetooth uses the same spectrum; too many active devices cause congestion
- Neighboring smart home devices — cheap IoT devices with poor RF filtering
Solutions: Switch your router and devices to the 5 GHz band, which is far less congested and immune to microwave interference. Most modern routers broadcast both 2.4 GHz and 5 GHz simultaneously. Connect your Windows 11 PC to the 5 GHz network. Move the router away from microwaves and cordless phone bases.
Fix 13: Replace Your Network Adapter
If you have worked through all the software fixes above and your internet keeps disconnecting, the physical network adapter may be failing. Laptop WiFi adapters can develop hardware faults that cause intermittent disconnections even when drivers are current and settings are correct. Desktop systems often have PCIe WiFi cards or USB adapters that can fail.
Test with a USB WiFi Adapter First
Before replacing an internal adapter, purchase an inexpensive USB WiFi adapter ($15–$30). Plug it in, install the driver, and connect to your network. If the disconnections stop with the USB adapter, your internal adapter has a hardware fault and needs replacement.
Replace Internal Adapter (Desktop)
For desktops, a PCIe WiFi card can be replaced by removing the old card and inserting a new one in the PCIe slot. Popular reliable options in 2026 include the Intel Wi-Fi 6E AX210 and TP-Link Archer TX3000E.
Replace Internal Adapter (Laptop)
Laptop WiFi cards are M.2 modules inside the chassis. Replacement is possible but requires opening the laptop — if you are not comfortable doing this, contact a technician. Alternatively, a USB WiFi adapter is a permanent solution that does not require disassembly.
Fix 14: Switch to Ethernet
If your internet keeps disconnecting on WiFi but you have confirmed the router is working (other devices are stable, or Ethernet connections do not drop), switching your Windows 11 PC to a wired Ethernet connection is the most reliable permanent solution. Ethernet is not subject to wireless interference, adapter power management issues, or signal degradation through walls.
Connect an Ethernet Cable
Use a Cat5e or Cat6 Ethernet cable to connect from your Windows 11 PC to your router or network switch. Windows 11 will automatically detect the wired connection and prefer it over WiFi.
If Ethernet Also Disconnects
If your internet keeps disconnecting on Ethernet as well, the problem is upstream — either the router, the modem, or your ISP connection. Call your ISP to check for line quality issues or outages in your area. Ask them to run a line test to identify signal degradation on the coaxial or phone line.
Replace the Ethernet Cable Itself
If using Ethernet but internet still disconnects, try a different cable. Cat5 cables older than 5–7 years can develop physical faults at the connector ends that cause intermittent disconnections. A new Cat6 cable ($8–$15 for a 10-foot cable) eliminates this variable.
What to Tell Your ISP
If none of these 14 fixes resolve your internet disconnections, the problem may be with your ISP's infrastructure. Before calling, run PingPlotter (free version available) for 24 hours while your internet is dropping. This creates a log of packet loss and latency spikes that you can share with your ISP's technical support team as evidence of where in the network path the disconnections are occurring.
When calling your ISP about internet that keeps disconnecting, ask specifically for:
- A line quality test to check signal levels, noise, and SNR (Signal-to-Noise Ratio) on your connection
- A technician visit to inspect the physical cable running from the street to your home, which can degrade over time
- A modem swap if your modem is more than 3–4 years old — modems develop hardware faults that cause intermittent disconnections
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Frequently Asked Questions
Random internet disconnections on Windows 11 are caused by one of several issues: an outdated or corrupted network adapter driver, Windows power management settings that put the adapter to sleep, corrupted TCP/IP network stack settings, interference from nearby WiFi networks, a router firmware bug, a faulty network cable, or an ISP-side outage. The most common cause is Windows power management automatically disabling the network adapter to save power — this is fixed in Device Manager under the adapter's Power Management tab (Fix 7 in this guide).
The most effective step is to disable power management for your WiFi adapter: open Device Manager, expand "Network adapters," right-click your WiFi adapter, go to Properties → Power Management tab, and uncheck "Allow the computer to turn off this device to save power." Also disable WiFi Sense (Settings → Network & internet → WiFi → WiFi settings) and ensure your network adapter driver is up to date. If disconnections continue, reset the TCP/IP stack and flush DNS using Fix 4 and Fix 5 in this guide.
Resetting TCP/IP resolves internet disconnections when the problem is caused by a corrupted network stack — which can happen after malware removal, a failed Windows update, or VPN/firewall software conflicts. The commands "netsh winsock reset" and "netsh int ip reset" rebuild the Windows networking stack from scratch. Many users report that intermittent disconnections that persisted for weeks are completely resolved after this. However, if the cause is a hardware problem (bad adapter, router issue) or a driver problem, TCP/IP reset alone will not fix it.
Yes — the router is one of the most common causes of internet that keeps disconnecting. An overheating router, outdated router firmware with known bugs, or an overloaded DHCP table can all cause periodic disconnections. To test: connect a different device (phone, tablet) to the same WiFi. If it also disconnects, the router is the problem. Try power cycling the router (unplug 60 seconds), update firmware through its admin panel (192.168.1.1), and check that the router's ventilation is not blocked by objects placed on top of it.
Yes — switching from WiFi to Ethernet is the single most reliable way to eliminate random internet disconnections caused by wireless interference, adapter power management issues, or weak signal. If your internet disconnects randomly on WiFi but does not disconnect on Ethernet, the problem is definitively wireless-related. If it disconnects on Ethernet as well, the issue is with the router, modem, or your ISP connection rather than your wireless hardware or driver.