It's a common occurrence for a smartphone or tablet to connect to the home network without issue, but a desktop computer or laptop stubbornly displays "No internet access." This can be confusing, as the router appears to be working properly, and other devices are functioning normally. More often than not, the root cause of the problem lies not with the ISP, but with a local conflict in the PC's settings or outdated network card software.
In this article, we'll take a detailed look at the main causes of this behavior. We'll examine both software glitches in the operating system Windows, as well as possible hardware limitations. Understanding the nature of the error will help you save time and avoid unnecessary calls to your provider's technical support when the problem can be resolved in a couple of clicks.
IP address conflict or incorrect DNS settings are the most common culprits. Also, don't discount the simple fact that drivers are outdated, which happens unnoticed after a major system update. Let's go through all the diagnostic steps step by step.
Network card and driver diagnostics
The first thing to do if you're experiencing a connection issue is to check the network adapter status. This often happens after an improper shutdown. Windows or a power surge, the device driver "freezes" and stops responding to system requests, although the card is physically functional.
Go to device Manager via the Start button context menu. Find the "Network adapters" section. If next to the name of your card (for example, Realtek PCIe GBE Family Controller or Intel Wireless) If a yellow exclamation mark is lit, the device is not working properly. In this case, you must completely uninstall the driver and restart the computer to automatically reinstall it.
Sometimes the problem lies in the power saving settings. The system may mistakenly turn off the adapter to save power, after which it cannot wake it up. Open the adapter's properties, go to the "Power Management" tab, and uncheck "Allow the computer to turn off this device to save power."
- 🔍 Check if the connection indicator on the motherboard or USB dongle is lit.
- 💻 Make sure there are no error codes 10, 28, or 43 in Device Manager.
- 🔄 Try rolling back the driver to the previous version if the problem appeared after an update.
- 🔌 Reconnect the Ethernet cable or USB adapter to a different port.
☑️ Adapter diagnostics
IP address conflicts and TCP/IP settings
One of the most common reasons why there's no internet on a computer but it works on a phone is a static IP address manually entered in the PC settings. The router assigns addresses automatically through DHCP server, but if the computer is hard-coded with an address from a different subnet, the connection will not be established.
To check, go to Control Panel → Network and Internet → Network and Sharing CenterClick on the name of your connection, then “Properties.” Find the line Internet Protocol version 4 (TCP/IPv4) and select Properties. Make sure the "Obtain an IP address automatically" and "Obtain DNS server address automatically" boxes are checked.
⚠️ Note: If you use specific corporate software or a configured tunnel for work, manual IP settings may be required. In this case, verify the information with your system administrator, as automatic mode may disrupt access to internal resources.
Resetting the TCP/IP stack via the command line also helps. Launch Terminal as administrator and enter the command netsh int ip reset, and then netsh winsock resetAfter running the commands, be sure to restart your computer. This will clear the network settings cache and resolve any protocol errors.
What is MAC filtering?
Some routers have MAC address filtering. If enabled, the router only allows known devices (like a phone) through, blocking new ones (like a PC). Check the list in your router settings (usually the "Wireless MAC Filtering" section) and add the MAC address of your computer's network card to the whitelist.
Problems with DNS servers
Often, a computer is technically connected to the router, but pages won't open, returning a DNS error. This means the computer can't resolve the website name (e.g., google.com) into a machine-readable IP address. A phone might be using its own settings or mobile DNS, so everything works fine there.
Try specifying reliable public DNS servers, such as those from Google or Cloudflare. In the IPv4 protocol properties (the path is described above), select "Use the following DNS server addresses." In the Preferred server field, enter 8.8.8.8, in the alternative - 1.1.1.1.
After changing DNS, clear the cache by running the following command in the command line: ipconfig /flushdnsThis action often solves the problem when the browser says "The server's DNS address cannot be found," but instant messengers (Skype, Telegram) can still work, since they use IP addresses directly.
| DNS provider | Preferred address | Alternative address | Peculiarities |
|---|---|---|---|
| Google Public DNS | 8.8.8.8 | 8.8.4.4 | High speed, stability |
| Cloudflare | 1.1.1.1 | 1.0.0.1 | Emphasis on privacy |
| OpenDNS | 208.67.222.222 | 208.67.220.220 | Phishing filtering |
| Quad9 | 9.9.9.9 | 149.112.112.112 | Blocking malicious websites |
Antiviruses and firewalls
Third-party antivirus software often has a built-in firewall, which can block connections by deeming the network "Public" or "Unsecure." If you've recently updated your antivirus or installed a new version, Kaspersky, ESET or Avast, check their logs.
Try temporarily disabling network protection in your antivirus. If you can connect to the internet, the problem lies with your filtering rules. Don't leave your computer unprotected for long periods of time—it's best to reset the security level for your home network to "Trusted."
It's also worth checking the built-in Windows firewall. Sometimes the rules get out of whack, blocking all incoming and outgoing traffic. Temporarily disable the firewall in the Control Panel to test. If this helps, reset the firewall rules to default values.
- 🛡️ Temporarily disable your antivirus to test the hypothesis.
- ⚙️ Check your network type: The "Public" network has stricter restrictions.
- 🔄 Reset Windows Firewall settings to default.
- 📝 Check your antivirus event log for any blocking.
Features of connection via cable and Wi-Fi adapters
If you connect your computer via cable and your phone via Wi-Fi, the difference in performance may be due to physical damage to the cable or port. The cable may be pinched or the connector may be corroded. The Wi-Fi signal remains stable for mobile devices.
When using USB Wi-Fi adapters on PCs, they often overheat and lose contact. Unlike phones, computers may not have a high-quality cooling system for external modules. Try connecting the adapter via a USB extension cable to place it further away from the case.
The signal frequency is also important. Many older computer adapters only work in the range 2.4 GHz, while modern routers can prioritize the 5 GHz band for mobile devices. If the router combines networks under a single name, the PC may get lost when trying to connect.
Resetting the router and the provider's work
A glitch in the router itself can't be ruled out either. A router is a mini-computer, and it too runs out of RAM. It could simply "forget" to assign an address to your PC while continuing to service the phone. Restarting the router (unplugging it from the power outlet for 15 seconds) often solves the problem.
Check if you've reached the limit on connected devices. Some plans or router models have a limit on the number of clients (for example, up to 5 devices). If you have a lot of devices at home, your PC may simply not be in the queue for an IP address.
⚠️ Note: Router interfaces (TP-Link, ASUS, Keenetic) are constantly being updated. The location of DHCP or MAC filtering settings may differ from those described. Always refer to the latest manuals for your specific model.
If all else fails, call your provider. They may be undergoing maintenance, or your account may have been blocked due to non-payment, but your phone continues to use mobile 4G, creating the illusion of Wi-Fi.
Why does my phone show Wi-Fi but there is no internet?
Sometimes the phone is connected to the router, but the router itself doesn't have access to the global network. Check the WAN indicator on the router. If it's off or red, the problem lies with the ISP or the cable coming into the apartment.
Frequently Asked Questions (FAQ)
Why did the Internet disappear after reinstalling Windows?
During a clean system installation, network card drivers are often not installed. The computer uses a standard driver, which may not support your hardware. You should download the drivers from the laptop or motherboard manufacturer's website.
Can an antivirus block the entire internet?
Yes, your antivirus's firewall may mistakenly classify your home network as public and block the connection. Try temporarily disabling the firewall for diagnostic purposes.
What should I do if it says "Identification..." and doesn't go any further?
This indicates that the computer isn't receiving a response from the router's DHCP server. Check the cable, automatic IP settings, and try a static DNS (8.8.8.8).
Does the date and time affect my internet connection?
Yes, if the date on your computer is significantly different from the actual date (for example, the year 2010), browsers will block connections to secure sites (HTTPS) due to a security certificate error.
Will replacing the cable help?
If you're using a wired connection, cable damage is one of the main causes of connection loss. Replace the patch cord with a known-good one to test.