A Windows 11 PC that suddenly can’t reach the internet — or drops the connection every few minutes — is one of the most common support tickets in any office. The cause is rarely one single thing, which is why a systematic pass through adapter, driver, and network-stack checks finds the fix faster than guessing.
Common Symptoms
- The network icon in the taskbar shows a globe with an exclamation mark or “No internet, secured”
- Web pages fail to load but other devices on the same network work fine
- The connection works for a few minutes, then drops repeatedly
- Ethernet works but Wi-Fi doesn’t, or vice versa
Possible Causes
- A corrupted or outdated network adapter driver after a Windows Update
- IP address conflict or an exhausted DHCP lease
- Incorrect DNS server settings
- Power-saving settings turning the adapter off to save battery
- A misconfigured VPN or third-party firewall client
Before You Begin
Confirm whether the problem affects one device or the entire network by checking if another laptop or phone can browse normally on the same Wi-Fi/Ethernet. That single check tells you whether to focus on this PC or on the router.
Method 1 — Run the built-in Network Troubleshooter
Apply suggested fixes
Let Windows apply any fix it detects, then reconnect and retest.
Method 2 — Reset the network adapter
Disable and re-enable the adapter
Open Device Manager → Network adapters, right-click your adapter, select Disable, wait 10 seconds, then Enable.
Flush and renew the IP configuration
Open a PowerShell/CMD window as Administrator and run the commands in the Useful Commands section below.
Method 3 — Update or roll back the network driver
Method 4 — Disable adapter power saving
Open adapter power management
Device Manager → your adapter → Properties → Power Management tab.
Useful Commands
ipconfig /releasenipconfig /renewnipconfig /flushdnsGet-NetAdapternGet-NetIPConfigurationResetting network settings (Settings → Network & Internet → Advanced network settings → Network reset) removes and reinstalls all network adapters and resets other networking components to factory settings. Save any VPN or proxy configuration details before doing this — you will need to re-enter them afterward.
If only one specific app or website is affected, the network itself is probably fine — the issue is more likely DNS, a firewall rule, or a proxy setting scoped to that app.
Watch the Video
Prefer watching? This tutorial covers the same steps.
Frequently Asked Questions
Why does my Wi-Fi keep disconnecting only on Windows 11?
It’s frequently a power-management setting turning the wireless adapter off to save battery, or an outdated Wi-Fi driver that hasn’t been updated since the Windows 11 upgrade.
Should I reset the entire network stack?
Try the targeted methods above first. A full network reset is effective but wipes saved Wi-Fi passwords and VPN configurations, so treat it as a last resort.
Conclusion
Most Windows 11 connectivity problems trace back to a driver, a power-saving setting, or a stale IP lease — all fixable without reinstalling Windows. Work through the methods in order and retest after each one before moving to the next.
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