Computer Won't Connect to Wi-Fi? A Step-by-Step Fix

Confirm it is just this computer

First, check whether other devices — your phone, a tablet, another computer — can connect to the same Wi-Fi. If they can, the internet and router are fine, and the issue is isolated to this one computer. If nothing can connect, the problem is your router or NBN connection instead, which is a different fix.

This quick check saves you troubleshooting the wrong thing. The rest of this guide assumes other devices work and only this computer is struggling, which is the most common scenario and usually the easiest to fix.

Restart the computer and the router

The classic fix exists for a reason. Restart your computer fully, and while you are at it, restart your router by unplugging it for 30 seconds. Let both come back up completely. This clears temporary network glitches on both ends and resolves a large share of connection problems with no further effort.

Give the router a couple of minutes to fully reconnect before testing. If your computer connects after this, it was a temporary glitch. If not, move on — the cause is something more specific on the computer.

Toggle Wi-Fi and forget the network

Make sure Wi-Fi is actually switched on — laptops have a physical switch or a function key that can disable it accidentally, and Airplane mode does the same. Toggle Wi-Fi off and on. If it is on but will not connect, try forgetting the network and reconnecting: remove the saved network, then select it again and re-enter the password.

Forgetting and rejoining clears a corrupted saved connection, which is a common cause of a computer that sees the network but refuses to join. Double-check the password as you re-enter it, since a saved wrong password will silently block the connection.

Run the network troubleshooter and reset the adapter

Windows has a built-in network troubleshooter that automatically detects and fixes many common issues — right-click the network icon and run it. It can reset the adapter, renew the connection and clear faults without you needing to know the technical detail. On Mac, turning Wi-Fi off and on and rejoining covers most of the same ground.

If that does not work, a network reset clears all network settings back to default, which fixes deeper configuration problems. Be aware it removes saved Wi-Fi passwords, so have them handy to reconnect afterwards. It is a reliable cure for a stubbornly offline computer.

Update or reinstall the Wi-Fi adapter driver

An outdated, corrupted or missing Wi-Fi driver is a frequent cause, especially after a Windows update. In Device Manager, under Network adapters, you can update the wireless adapter driver, or uninstall it and restart so Windows reinstalls it fresh. This often restores a connection that vanished after an update.

If the computer has no internet at all to download a driver, you can connect temporarily with an Ethernet cable, or download the driver on another device and transfer it via USB. A correct, current Wi-Fi driver is essential, and reinstalling it fixes many otherwise baffling cases.

Check for IP and DNS issues

Sometimes the computer connects to Wi-Fi but still has no internet, which usually points to an IP address or DNS problem. Releasing and renewing the IP address, or flushing the DNS, clears these — the network troubleshooter often does this automatically. A connection that says connected, no internet is the classic symptom here.

These steps are a little more technical, but they resolve the frustrating situation where the Wi-Fi shows as connected yet nothing loads. If you are not comfortable with command-line steps, the built-in troubleshooter handles most of it, or a technician can sort it quickly.

When the Wi-Fi hardware has failed

If nothing above works and the computer cannot see any networks at all, the wireless adapter hardware may have failed — uncommon, but it happens, especially after age or a knock. A quick way to confirm is a cheap USB Wi-Fi adapter: if that connects instantly, the built-in wireless card is the problem.

A failed internal Wi-Fi card can be replaced, or a USB adapter can serve as a simple, low-cost workaround. We diagnose Wi-Fi and connection problems across Western Sydney, work out whether it is settings, drivers or hardware, and get you reliably back online — for homes and businesses, on-site or remotely.

Quick checklist

• Confirm other devices connect (isolates the computer)
• Restart the computer and router
• Forget the network and rejoin with the correct password
• Run the network troubleshooter or do a network reset
• Update or reinstall the Wi-Fi adapter driver

Frequently asked questions