If Wi-Fi works on your phone but not your laptop or computer, you have already discovered one of the most useful clues in troubleshooting the problem. If another device can use the same internet connection normally, a general NBN or internet provider outage becomes much less likely.
The problem has been narrowed considerably. Instead of treating the whole internet connection as broken, attention can shift toward the affected computer, the way it is connecting to Wi-Fi, or software and network settings on that device.
If the cause is not obvious, PcRiot provides Wi-Fi and internet help in Perth to diagnose computer-specific connection problems as well as modem, router and home-network faults.
Another working device is an important diagnostic clue
When your phone can browse websites and use online apps through the same home Wi-Fi while the laptop cannot, several parts of the connection are already proven to be working.
The phone has successfully travelled through this path:
Phone -> Wi-Fi -> Router -> Internet
That means the router has at least some working internet access and is capable of providing it to a connected device.
The failed path is narrower:
Laptop -> Wi-Fi -> Router -> Internet
Something affecting that particular computer may be preventing it from completing the same journey.
This does not prove that the router is completely innocent. Routers can behave differently with different devices, wireless bands or security settings. However, it substantially reduces the likelihood that the entire NBN or ISP service is simply offline.
First make sure the phone is really using Wi-Fi
Before changing anything on the computer, confirm that the working phone is actually using the home Wi-Fi rather than silently falling back to its mobile data connection.
This is particularly important with smartphones because they can remain online through 4G or 5G even when the Wi-Fi connection itself has stopped providing internet access.
- πΆ Check the Wi-Fi connection: Confirm that the phone is connected to the same home network the laptop is trying to use.
- π± Exclude mobile data: Temporarily disabling mobile data can confirm that the phone genuinely reaches the internet through Wi-Fi.
- π Test something online: Open a website or another service that requires a live internet connection rather than relying on an app that may be showing previously cached information.
If the phone still works normally through Wi-Fi, the comparison is meaningful and the laptop or computer becomes the logical place to investigate.
The saved Wi-Fi connection may be damaged or outdated
Computers store information about Wi-Fi networks they have connected to previously. That saved profile can occasionally become stale, corrupted or incompatible with changes made to the modem or router.
The computer may still show the network name and even report that it is connected while the saved configuration is no longer working correctly.
A sensible early test is to disconnect from the Wi-Fi and reconnect. If that changes nothing, forgetting the saved network and joining it again with the correct password can rebuild the wireless profile without resetting the entire computer or router.
This is especially worth considering if the problem began after:
- π Replacing or resetting the modem or router.
- π Changing the Wi-Fi password or network name.
- βοΈ Changing wireless security or compatibility settings.
- π» A Windows update or significant change to the computer.
The computer may have the wrong IP or DHCP settings
Connecting to Wi-Fi is only part of joining a network. The computer also needs suitable network information so it knows how to communicate with the router and reach the internet.
In most home networks, the modem or router automatically provides this information using DHCP.
A computer can lose internet access if it has:
- π’ An incorrect IP address: The computer may not have received a usable address for the current network.
- πͺ The wrong gateway: It may not know the correct route from the local network to the internet.
- π Old manual settings: A static IP configuration left from another network can conflict with the current router.
- π Stale DHCP information: The computer may be holding network information that no longer matches the router configuration.
This is one reason repeatedly restarting the modem is often ineffective when every other device already works. The modem may be doing its job while one computer has incorrect local network settings.
DNS can fail on one computer while everything else works
DNS is the system that translates website names into the network addresses computers use to reach them.
If DNS is misconfigured or being interfered with on one computer, the Wi-Fi connection can appear completely normal while websites refuse to load.
Computer-specific DNS problems can be caused by manually entered settings, VPN software, security software or configuration left behind by previous troubleshooting.
It is tempting to respond by immediately replacing the DNS servers with addresses suggested online. Sometimes that changes the symptom, but it is better to determine whether DNS is actually the failing part of the connection before changing more settings.
The Wi-Fi adapter or driver may be the problem
If the phone works but the laptop does not, the laptop’s wireless adapter becomes another likely place to investigate.
The adapter is the hardware inside the computer that communicates with the wireless network. Windows also depends on a driver to control that hardware correctly.
Possible problems include:
- π‘ The Wi-Fi adapter has stopped responding correctly.
- πΎ The network driver is damaged, outdated or no longer behaving correctly.
- β‘ Power-management behaviour is disabling or destabilising the adapter.
- π The adapter has difficulty with the router’s current wireless mode or security configuration.
A driver problem does not automatically mean the driver should be uninstalled. Removing a working network driver without having the correct replacement available can leave the computer with no usable Wi-Fi connection at all.
A VPN, proxy or security program can block the internet
Software installed on the computer can interfere with internet traffic even when the Wi-Fi connection itself is healthy.
This is particularly worth checking if the problem started after installing, updating or removing a VPN, antivirus product, firewall, web-filtering program or other security software.
- π‘οΈ VPN: A failed VPN connection or leftover network filter can prevent normal internet traffic after the VPN appears to be disconnected.
- π Proxy: An incorrect proxy configuration can send browser traffic toward a server that is unavailable.
- 𧱠Firewall or security software: Network filtering can block traffic on one computer while phones and other household devices remain completely unaffected.
If you deliberately use a VPN, temporarily disconnecting it is a useful low-risk comparison. Disabling multiple security components at once is not.
Windows networking itself can become misconfigured
Windows contains several layers involved in networking, including the Wi-Fi profile, network adapter, IP configuration, DNS settings, network services and software filters installed by other applications.
A fault in one of these areas can produce symptoms such as:
- β οΈ Connected but no internet.
- π No Internet, secured.
- β Unidentified network.
- π Normal Wi-Fi connection but browsers and online applications do not work.
- π Internet access that returns temporarily after restarting the computer.
The same general diagnostic principle applies to a Mac: if other devices work but that Mac does not, the fault is more likely to involve the affected computer or its interaction with the network than a complete internet outage.
The exact troubleshooting steps differ between Windows and macOS, which is another reason it is better to diagnose the failed layer before applying generic reset instructions.
Try the computer on another internet connection
One of the most useful tests is to connect the affected laptop to another known-working network.
A phone hotspot can be particularly useful because it creates an entirely separate internet connection for comparison.
- β The laptop works on the hotspot: Its basic internet capability is working, so the fault probably involves the connection between that computer and the home Wi-Fi environment.
- β The laptop also fails on the hotspot: The problem points more strongly toward the computer itself, its adapter, network settings or installed software.
- π Ethernet works but Wi-Fi does not: The internet connection is available to the computer, making the wireless adapter, driver, saved profile or Wi-Fi configuration more likely.
No single test identifies every fault, but these comparisons progressively narrow the problem instead of changing settings at random.
Do not reset the whole network when the evidence points to one computer
If phones, tablets, televisions and other computers are all using the internet normally, a factory reset of the modem or router is rarely a sensible first response.
It can remove working Wi-Fi and internet configuration from every device while leaving the original computer problem unresolved.
- β οΈ Do not factory-reset a working modem or router just because one laptop has no internet.
- β οΈ Do not change IP, DNS, proxy, firewall and driver settings simultaneously.
- β οΈ Do not uninstall the Wi-Fi adapter or driver without knowing how it will be restored.
- β οΈ Do not assume Windows needs a complete network reset before checking the simpler causes.
The working phone is valuable precisely because it gives you a known-good comparison. Troubleshooting should use that evidence rather than destroying the working configuration and starting again.
When the router can still be responsible
Although another working device shifts suspicion strongly toward the affected computer, it does not completely rule out the modem or router.
A particular laptop can still have trouble because of wireless compatibility, security settings, access controls, address allocation or the way a mesh or extender system handles that device.
This becomes more likely when the computer works perfectly on other Wi-Fi networks but repeatedly fails only on the home network.
In that situation, both sides of the connection may need to be compared: the computer’s network configuration and the router settings it is trying to use.
Get help when one computer cannot get online
If every other device can use the internet but your laptop or PC cannot, the problem is often diagnosable without disrupting the rest of the household network.
PcRiot can check the affected computer’s saved Wi-Fi connection, IP and DHCP configuration, DNS, network adapter and driver, VPN or proxy settings, security software and Windows networking configuration. Where necessary, the modem or router can also be checked for settings affecting that particular device.
PcRiot provides onsite Wi-Fi and computer internet troubleshooting in Perth for homes and small businesses.