Your computer can't connect because of a problem with the router, your device's WiFi hardware, or the connection between them

When your computer refuses to connect to WiFi, the issue almost always falls into one of three categories: the router itself is having trouble, your computer's WiFi radio is turned off or malfunctioning, or something is blocking the connection. The good news is that you can test each one in order, and most of the time you'll find and fix the problem in under ten minutes.

Start by checking whether other devices in your home can connect to the same WiFi network. If your phone, tablet, or a different computer connects without trouble, the problem is with your computer, not the router. If nothing connects, the router is the culprit, and you should restart it by unplugging it for 30 seconds, then plugging it back in. Wait two minutes for it to fully restart before testing again.

Key Takeaways

  • If other devices connect to your WiFi but your computer doesn't, the problem is with your computer's WiFi hardware or settings, not the router.
  • Check whether WiFi is physically turned on by looking for a WiFi icon in your system tray and confirming it shows available networks.
  • Restarting your router by unplugging it for 30 seconds fixes most connection problems when multiple devices are affected.
  • Forgetting the network and reconnecting forces your computer to re-enter the password and clears cached connection settings that sometimes cause failures.
  • If your computer sees the network but won't connect, the password is wrong, the network is full, or your device's WiFi driver needs updating.

Check whether WiFi is turned on in Windows or Mac

Your computer may have WiFi disabled in software even though the hardware is working. On Windows, look at the bottom right corner of your screen in the system tray. You should see a WiFi icon that looks like curved lines or a fan shape. Click it to open the network menu. If you see "WiFi" with a toggle switch, make sure the toggle is turned on (it should be blue or highlighted). If the toggle is grayed out or off, click it to turn WiFi back on.

On a Mac, click the WiFi icon in the top right corner of the menu bar — it looks like curved lines. If you see "WiFi: Off" in the dropdown menu, click it to turn WiFi on. If the icon is crossed out or missing entirely, your Mac's WiFi hardware may not be responding, and you'll need to move to the troubleshooting steps below.

Some laptops also have a physical WiFi button or a keyboard shortcut (often Fn plus a key with a WiFi symbol) that turns the radio on and off. Check your laptop's manual or search for "[your laptop model] turn on WiFi" if the software toggle doesn't work.

Forget the network and reconnect with the password

Your computer stores connection information for every WiFi network it has ever joined. Sometimes that stored information becomes corrupted or outdated, and your computer can't reconnect even though the password is correct. Forgetting the network and reconnecting forces your computer to start fresh.

On Windows, open the Settings app and go to Network & Internet, then WiFi. Scroll down and click "Manage known networks." Find your network name in the list, click it, and select "Forget." Go back to the WiFi menu, find your network in the available networks list, click it, and enter the password again.

On a Mac, go to System Settings, then WiFi. Click "Details" next to your network name, then click the minus button at the bottom to remove it. Close the settings window, wait a few seconds, then click the WiFi icon in the menu bar and select your network from the list. Enter the password when prompted.

Verify you're using the correct password

The most common reason a computer won't connect is a typo in the WiFi password. Passwords are case-sensitive, meaning capital letters are different from lowercase letters. If you're not sure whether you typed it correctly, try typing it again slowly, paying attention to uppercase and lowercase letters.

If you don't remember the password, you can find it on your router. Look for a sticker on the back or bottom of the router that shows the network name (SSID) and password. The password may be labeled "Key," "Passphrase," or "Security Key." If the sticker is missing or unreadable, you can reset the router to its factory settings by holding down the reset button for 10 seconds, but this will erase any custom settings you've made and return the network name and password to the defaults printed in the router's manual.

Restart your computer and your router

Restarting both devices clears temporary errors that prevent connection. Restart your computer first by shutting it down completely, waiting 10 seconds, and turning it back on. Once it's fully booted, try connecting to WiFi again.

If that doesn't work, restart your router. Unplug the power cable from the back of the router, wait 30 seconds, and plug it back in. The lights on the router will blink as it restarts — this usually takes one to two minutes. Once the lights stop blinking and stabilize, wait another 30 seconds, then try connecting your computer again.

Restarting both devices in this order works because it clears the connection history on both sides. Your computer forgets any failed connection attempts, and your router forgets any devices that were stuck in a connection loop.

Update your WiFi driver on Windows

Your computer's WiFi hardware needs a driver — a piece of software that tells Windows how to communicate with the WiFi radio. If the driver is outdated or corrupted, your computer may not be able to connect even though the hardware is working.

On Windows, 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 contains "Wireless" or "WiFi" — it might say something like "Intel Wireless-AC" or "Realtek Wireless." Right-click it and select "Update driver." Choose "Search automatically for updated driver software" and let Windows search for and install the latest version. Restart your computer when the update is complete.

If Windows can't find an updated driver, go to your computer manufacturer's support website, search for your model number, and read the latest WiFi driver from there. Follow the installation instructions included with the read.

Check whether your network is full or has connection limits

Some routers have a maximum number of devices that can connect at the same time. If you've reached that limit, new devices won't be able to join. Check your router's manual or the manufacturer's website to find the maximum device limit for your model.

If you're at the limit, disconnect a device you're not using. On the device you want to remove, go to your WiFi settings and forget the network. Then try connecting your computer again.

You can also check how many devices are currently connected by logging into your router's admin panel. Open a web browser and type the router's IP address (usually 192.168.1.1 or 192.168.0.1) into the address bar. Log in with the admin username and password (these are often "admin" and "admin" or printed on the router). Look for a section called "Connected Devices" or "DHCP Clients" to see how many devices are online.

Check for interference from other devices

WiFi signals travel on radio frequencies that other devices also use. Microwaves, cordless phones, baby monitors, and some older Bluetooth devices can interfere with WiFi and cause connection problems. If your computer is far from the router or surrounded by these devices, interference may be preventing connection.

Move your computer closer to the router and away from microwave ovens and cordless phones. If the connection works in a different location, interference is the problem. You can reduce it by moving the router to a higher shelf, away from the floor, and away from walls and metal objects. If you have a dual-band router (which supports both 2.4 GHz and 5 GHz networks), try connecting to the 5 GHz network instead — it's less prone to interference but doesn't travel as far.

Frequently Asked Questions

Why does my computer see the WiFi network but won't connect?

Your computer can see the network but can't join it for three main reasons: the password is wrong, the network is full, or your WiFi driver is outdated. Start by re-entering the password carefully, paying attention to uppercase and lowercase letters. If that doesn't work, try updating your WiFi driver or checking whether the router has reached its device limit.

My computer connected before but suddenly stopped. What changed?

The most likely causes are that your router lost power or restarted, your WiFi password was changed, or your computer's WiFi driver was updated. Restart your router first. If that doesn't work, check whether the password changed by looking at the sticker on the router or asking whoever manages the network. If you recently updated Windows, restart your computer and check for driver updates.

Can I connect to WiFi with an Ethernet cable while I fix this?

Yes. If your computer has an Ethernet port, you can plug a cable directly from the router to your computer to get online while you troubleshoot the WiFi problem. This also lets you read driver updates without needing WiFi.

How do I know if my computer's WiFi hardware is broken?

If other devices connect to your WiFi without trouble, but your computer can't see any networks at all and the WiFi icon is missing or grayed out, your hardware may be failing. Try the driver update steps first. If that doesn't work, your WiFi card may need to be replaced — contact your computer manufacturer's support line or a local repair shop for help.

Should I restart my router every time I have a connection problem?

Restarting your router is the first step for any WiFi problem that affects multiple devices. For problems with just one computer, start by checking whether WiFi is turned on and whether the password is correct. Restart the router only if those steps don't work or if other devices can't connect either.