Every Windows user is familiar with the situation where the Wi-Fi indicator is on, but websites won't open. You see the "Connected" status, but the browser stubbornly returns a DNS error or connection timeout. This is a classic error where there is a physical connection to the router, but data transfer to the external network is blocked.
The problem could be due to a software glitch in the operating system, incorrect router or ISP settings, or temporary issues on the ISP's end. Updated drivers, misconfigured IP addresses, or temporary issues on the ISP's end are common causes. Diagnostics It starts with checking the connection status and analyzing the system logs.
Don't panic if your internet connection goes down while your Wi-Fi is working. In most cases, it takes between 2 and 15 minutes to restore service. We'll walk you through a step-by-step process that will help you get your network back up and running without calling a technician.
Primary diagnostics and equipment testing
Before delving into the deep Windows settings, make sure your hardware is working properly. Sometimes the problem can be resolved by simply rebooting the device, which clears the cache and forces a reconnection to the ISP. Unplug the router, wait 10-15 seconds, and plug it back in.
Check that the WAN/Internet lights on your router are lit. If the WAN light is off or red, the ISP signal isn't reaching your home. In this case, PC settings won't help—the problem is with the line.
⚠️ Attention: If the WAN indicator blinks too quickly or does not light at all, contact your ISP's technical support before changing any computer settings.
It's also worth checking if the internet works on other devices. If your smartphone also can't load pages over Wi-Fi, the problem is definitely not with your PC, but with your router or data plan. If everything works fine on your phone but not on your computer, look for the cause in your Windows drivers or network settings.
Resetting network settings and working with IP/DNS
The most common reason for inaccessibility is an IP address conflict or incorrect DNS servers. Windows may be attempting to use a static address that is inappropriate for the current network. This can be resolved using the command prompt with administrator privileges.
Open the Start menu, type cmd, right-click "Command Prompt" and select "Run as administrator." In the window that opens, enter a series of commands to clear the cache and reset the TCP/IP stack.
ipconfig /flushdnsipconfig /registerdns
ipconfig /release
ipconfig /renew
netsh winsock reset
After executing the last command, the system will require a reboot. This is a critical step that rewrites the network libraries. If the problem was a software protocol glitch, it will resolve itself.
It's also worth checking your DNS settings manually. Go to Control Panel → Network and Internet → Network and Sharing CenterClick on your connection name, select "Properties," then "Internet Protocol Version 4 (TCP/IPv4)" and make sure that "Obtain addresses automatically" is selected, or enter Google's DNS: 8.8.8.8 And 8.8.4.4.
Updating and reinstalling Wi-Fi drivers
Outdated or corrupted drivers are the bane of the Windows operating system. After a major OS update, an old adapter driver may malfunction, causing connection interruptions or complete loss of access.
Open "Device Manager" from the Start button context menu. Find the "Network Adapters" section. If there's a yellow triangle next to your Wi-Fi module (usually labeled "Wireless," "802.11," or "Wi-Fi"), the driver definitely needs attention.
- 🔄 Right-click on the adapter and select "Update driver" → "Search automatically".
- 🗑️ If the update doesn't help, select "Remove device", then in the menu at the top, click "Action" → "Scan for hardware changes".
- 💻 Download the latest driver from the laptop or motherboard manufacturer's website if Windows' automatic search doesn't yield any results.
Windows often installs a generic Microsoft driver, which is unstable. Installing the manufacturer's original software (Intel, Realtek, Qualcomm) often solves the "Connected, but no internet access" issue.
Where can I find a driver if I don't have internet access?
Use your smartphone in USB modem mode or download the driver on another PC and transfer it via a flash drive. You can also use the built-in Windows drivers by running a new search after deleting the old one.
Power and energy saving settings
Windows 10 and 11 have aggressive power-saving settings that can disable the Wi-Fi adapter to conserve battery life. This causes the module to go to sleep and fail to reconnect properly.
To disable this feature, open Device Manager again. Locate your wireless adapter, go to Properties, and open the Power Management tab. Uncheck "Allow the computer to turn off this device to save power."
⚠️ Attention: Disabling power saving may slightly increase battery drain on laptops, but will ensure a stable connection.
Also, check your power plan in Windows. Search for "Choose a power plan" and select "High performance." Power saving mode may limit the Wi-Fi transmit power.
Software conflicts and antivirus programs
Third-party antivirus programs and firewalls often block network traffic, deeming it suspicious. After updating the virus database or the program itself, security settings may become overly strict.
Try temporarily disabling your antivirus software and checking your internet connection. If you can connect to the internet, add your network to your trusted list or upgrade your antivirus software to one that's more lenient on network connections.
Additionally, VPN programs, proxy servers, or tunneling utilities (such as older versions of Hamachi or TeamViewer) can conflict. They define their own network adapters and routing rules, which can interfere with standard traffic.
☑️ Checking third-party software
Table of error codes and solutions
Windows often displays a specific error code when diagnosing problems. Understanding the code helps quickly pinpoint the direction of the solution.
| Error code | Description of the problem | Solution method |
|---|---|---|
| 651 | The modem (or other communication device) reported an error. | Reboot the router, check the provider's cable |
| 678 | The remote computer is not responding | Reset TCP/IP settings, check MAC address |
| 691 | Access denied (incorrect login/password) | Checking PPPoE data in the router settings |
| No internet access | IP address received, but gateway not reachable | Team netsh winsock reset, DNS check |
If the error code doesn't help, try running the built-in troubleshooter. Right-click the Wi-Fi icon in the system tray and select "Diagnose." The system will attempt to find and fix simple configuration errors.
When the problem is on the provider's side
Sometimes all the PC and router settings are correct, the drivers are up to date, but the internet still doesn't work. This could indicate scheduled maintenance, a line failure, or a service block due to non-payment.
Check your provider's personal account via mobile internet. You'll often see notifications about maintenance there. Also, make sure your account balance is positive—if your balance reaches zero, it's automatically blocked immediately.
⚠️ Attention: Tariff plans and terms of service are subject to change. Please check the latest terms in your personal account or your operator's official app.
If you use MAC address binding, make sure that after replacing your router or network card, the new address is registered with your provider. Without this, you will not be able to access the network, even with the correct settings.
Frequently Asked Questions (FAQ)
Why is Wi-Fi connected, but there is no internet on only one computer?
Most likely, the problem lies with the settings of this particular PC: faulty DNS, IP conflict, outdated driver, or antivirus blocking. Check the network settings and drivers on this device.
How do I know if my ISP has blocked my access?
Try connecting to Wi-Fi from another device (smartphone, tablet). If there's no internet connection anywhere and the WAN indicator on the router isn't lit, the problem is with your provider or plan.
Can a virus disable the Internet?
Yes, some types of malware change proxy server settings or the hosts file, redirecting traffic or blocking connections. Run a full system scan with an antivirus program.
What to do if network reset commands don't help?
If resetting the network and reinstalling the drivers doesn't help, try creating a new access point (sharing Wi-Fi from your phone) and connecting to it. If the internet works via your phone, the issue lies with your PC's compatibility with the specific router or its security settings.