Your computer can't connect to WiFi because of a problem with the router, the WiFi adapter in your computer, or the connection between them
Most WiFi problems fall into a few categories: your router has lost power or crashed, your computer's WiFi is turned off or the driver is broken, the password is wrong, or your computer is too far from the router. The fastest way to find out which one is happening is to test whether other devices can connect to the same WiFi network. If your phone or tablet connects fine, the problem is with your computer. If nothing connects, the problem is almost certainly your router.
The good news is that you can fix most of these yourself in under five minutes. A few require a restart or a password change. Only a handful need a technician or a new part.
Key Takeaways
- Check whether other devices can connect to your WiFi — if they can, the problem is your computer, not your router.
- Restart your router by unplugging it for 30 seconds, then plugging it back in and waiting two minutes for it to fully boot.
- Make sure WiFi is turned on in your computer's settings — many laptops have a physical switch or keyboard shortcut that disables it.
- If your computer sees the network but won't connect, forget the network and reconnect using the correct password.
- If the problem persists after a restart, your WiFi driver may be outdated or broken, and you may need to update it through Device Manager.
Test whether the problem is your router or your computer
Pick up your phone, tablet, or any other device that has WiFi. Try to connect it to your home network. If it connects and works normally, your router is fine — the problem is with your computer. If nothing can connect, or if everything connects but the internet is slow or drops constantly, your router needs attention first.
This one test saves you an hour of troubleshooting. Do it before you do anything else.
Restart your router if other devices can't connect
Unplug your router from the power outlet. Wait 30 seconds — this clears the router's memory and forces it to start fresh. Plug it back in and wait two full minutes before trying to connect. Most routers take 60 to 90 seconds to boot, but waiting the full two minutes ensures all the lights have stopped blinking and the system is ready.
If your router has a separate modem (a box that connects to your wall outlet or cable line), unplug both the modem and the router. Wait 30 seconds, then plug the modem back in first. Wait another 30 seconds, then plug the router in. This order matters because the modem needs to reconnect to your internet service before the router can distribute that connection.
After the restart, try connecting again. This fixes roughly 70 percent of WiFi problems because routers can get stuck in a bad state and need a clean restart to recover.
Check that WiFi is turned on in your computer
On Windows, click the WiFi icon in the bottom right corner of your taskbar (it looks like radiating curved lines). If it says "WiFi is turned off," click it to turn it back on. Some laptops also have a physical WiFi switch or a keyboard shortcut — usually Fn plus a key with a WiFi symbol. Check your laptop's manual or the manufacturer's website if you're not sure which key.
On Mac, click the WiFi icon in the top right corner of the menu bar. If it says "WiFi: Off," click it to turn it on. The icon will change to show signal strength once WiFi is active.
If WiFi is already on but your computer still doesn't see any networks, move to the next step.
Forget the network and reconnect with the correct password
Sometimes your computer remembers an old or incorrect password for your network and keeps trying to use it. The fix is to delete that memory and reconnect from scratch.
On Windows, go to Settings > Network & Internet > WiFi > Manage Known Networks. Find your network name in the list, click it, and select "Forget." Then click the WiFi icon in the taskbar, find your network in the list of available networks, and click "Connect." When prompted, enter your WiFi password. The password is usually on a sticker on the back or bottom of your router, or in the paperwork that came with it.
On Mac, go to System Settings > WiFi, click "Details" next to your network name, then click the minus button to remove it. Click "WiFi" in the sidebar, find your network in the list, and click "Join." Enter your password when prompted.
If you don't know your password, you can reset your router to factory settings by holding down the reset button (usually a small recessed button on the back) for 10 to 15 seconds. This will erase all your settings, and you'll need to set up the router again from scratch using the setup app or website. Check your router's manual for the exact steps.
Update your WiFi driver on Windows
Your computer's WiFi adapter needs a driver — software that tells Windows how to use the hardware. If that driver is outdated or broken, your computer may not be able to connect even if everything else is working.
Right-click the Start button and select "Device Manager." Look for "Network adapters" and click the arrow next to it to expand the list. Find the entry that mentions WiFi or wireless (it usually has "Wireless" or "802.11" in the name). Right-click it and select "Update driver." Choose "Search automatically for updated driver software." Windows will search for a newer version and install it if one is found.
After the update finishes, restart your computer and try connecting to WiFi again. If Device Manager shows a yellow exclamation mark next to your WiFi adapter, the driver is definitely broken — updating it should fix the problem.
Check your distance from the router and look for interference
WiFi signals weaken with distance and are blocked by walls, metal, and water. If your computer is more than 50 feet from the router, or if there are multiple thick walls between them, the signal may be too weak to connect reliably. Try moving closer to the router and attempting to connect again.
Microwaves, cordless phones, baby monitors, and some wireless speakers use the same radio frequencies as WiFi and can cause interference. If you're using one of these devices near your router or computer, try turning it off temporarily and see if your connection improves. If it does, move the interfering device farther away from your router.
When to call a technician or replace hardware
If you've restarted your router, turned WiFi on, updated your driver, and tried reconnecting with the correct password, and your computer still won't connect while other devices do, your WiFi adapter hardware may be failing. This is rare in newer computers but more common in older laptops that have been dropped or exposed to liquid.
A technician can test your WiFi adapter and replace it if necessary. On a desktop computer, a replacement adapter costs $20 to $50 and is straightforward to install. On a laptop, replacement is more involved and may cost $100 to $300 in labor depending on the model. If your computer is very old, it may be cheaper to replace the entire machine.
Frequently Asked Questions
Why does my computer see the WiFi network but won't connect to it?
Your computer is receiving the network's signal but can't authenticate — usually because the password is wrong or outdated. Forget the network and reconnect using the password printed on your router. If that doesn't work, restart your router and try again.
My WiFi works for a few minutes, then drops. What's causing that?
This usually means your router is overheating, too far away, or experiencing interference. Try moving closer to the router, restarting it, and turning off devices that use the same radio frequencies (microwaves, cordless phones). If the problem continues, your router may be failing and need replacement.
How do I know if my WiFi adapter is broken?
Open Device Manager on Windows and look for your WiFi adapter under Network Adapters. If it has a yellow exclamation mark or a red X, the driver is broken or the hardware is failing. Try updating the driver first. If that doesn't work, the adapter itself may need replacement.
Can I use an ethernet cable instead of WiFi?
Yes. If your computer has an ethernet port, you can plug a cable directly from your router to your computer. This bypasses WiFi entirely and is often faster and more stable. It won't solve the WiFi problem, but it will let you use your computer while you troubleshoot.
Should I restart my computer or just my router?
Start with restarting your router — that fixes most problems. If that doesn't work, restart your computer. Restarting both together is rarely necessary unless your computer's driver is stuck in a bad state.