What WiFi drivers do and why you need them

A WiFi driver is software that lets your computer talk to your wireless network card. Without it, your computer cannot see or connect to WiFi networks, even if the hardware is working fine. If your computer suddenly lost WiFi, or never had it working after a fresh Windows install, a missing or broken driver is usually the reason.

Your computer shipped with drivers already installed, but they can stop working after a Windows update, a crash, or if you never installed them in the first place. The fix is straightforward: you find the right driver for your specific network card and install it. This guide walks you through finding and installing it on both Windows and Mac.

Key Takeaways

  • You need to know your network card model before you can find the right driver — Windows Device Manager shows this in seconds.
  • Most drivers come from the manufacturer's website (Intel, Realtek, Broadcom, Qualcomm) rather than from Windows Update.
  • On Windows, download the driver, run the installer, and restart your computer — the driver installs during startup.
  • On Mac, drivers usually install automatically through System Updates, but you may need to restart and check System Report if WiFi is still missing.
  • If you cannot connect to WiFi to download the driver, use another device or a USB drive to transfer the file to your computer.

Finding your network card model on Windows

Before you download anything, you need to know which network card your computer has. Open Device Manager by right-clicking the Start button and selecting "Device Manager" from the menu. Look for the section called "Network adapters" and click the arrow next to it to expand the list.

You will see one or more network devices listed. Look for anything with "Wireless", "WiFi", "802.11", or a brand name like "Intel", "Realtek", or "Broadcom". Write down the exact model name — for example, "Intel Wi-Fi 6 AX200" or "Realtek RTL8821CE Wireless LAN Controller". This is the name you will search for on the manufacturer's website.

If you see a yellow exclamation mark next to a network adapter, that means the driver is missing or broken. That is your problem device. If you see no network adapters at all, the hardware may not be recognized — this also points to a missing driver.

Downloading the driver from the manufacturer

Go to the website of the company that made your network card. The most common manufacturers are Intel, Realtek, Broadcom, and Qualcomm. Search their support or downloads page for your exact model number. For example, if you have an Intel Wi-Fi 6 AX200, search "Intel Wi-Fi 6 AX200 driver Windows 10" (or whatever Windows version you have).

The manufacturer's page will show driver versions for different Windows versions. Download the one that matches your Windows version. You can check your Windows version by right-clicking "This PC" or "My Computer", selecting Properties, and looking for "Windows 10" or "Windows 11" near the bottom. Download the driver file to your Downloads folder or Desktop — somewhere you can find it easily.

If the manufacturer's website is confusing, try searching "[your network card model] driver download" in a search engine. Stick to the official manufacturer website, not third-party driver sites, because those can bundle unwanted software.

Installing the driver on Windows

Once the driver file is downloaded, locate it on your computer. It will usually be a .exe file or a .zip file. If it is a .zip file, right-click it and select "Extract All", then choose where to extract it. Open the extracted folder and look for a file that says "setup.exe" or "install.exe".

Double-click the installer file. A window will open asking you to confirm the installation. Click "Yes" or "Next" to proceed. The installer will copy files to your computer and may ask you to restart. When it asks, save any open work and restart your computer. The driver installs during the restart process.

After your computer restarts, open Device Manager again and check the Network adapters section. Your WiFi adapter should now appear without a yellow exclamation mark. Open your WiFi settings and try connecting to a network. If you see available networks, the driver is working.

Installing drivers on Mac

Mac computers usually install WiFi drivers automatically through System Updates. If your WiFi is not working, start by checking for updates. Click the Apple menu in the top-left corner, select "System Settings" (or "System Preferences" on older Macs), and look for "General" or "Software Update". Click "Check Now" and install any available updates. Restart your computer when prompted.

If WiFi still does not work after updating, open System Report to see what network hardware your Mac has. Click the Apple menu, select "About This Mac", then click "System Report". In the left sidebar, click "Network" and look for your WiFi card model. Most Macs use Broadcom or Intel cards, and these drivers come built into macOS.

If you need to download a driver manually (rare on Mac), visit the manufacturer's website and search for your card model and your macOS version. Download the driver, double-click the installer, and follow the on-screen instructions. Restart when prompted. If WiFi still does not appear, the hardware itself may be damaged and need service.

What to do if you cannot download the driver

If your computer has no WiFi and you cannot download the driver, use another device to download it. Use a phone, tablet, or another computer connected to WiFi. Download the driver file and email it to yourself, or save it to a cloud service like Google Drive or OneDrive that you can access from your computer.

Alternatively, download the driver on another computer and transfer it using a USB drive. Plug the USB drive into the working computer, download the driver file to the drive, then plug the drive into your computer with no WiFi. Copy the driver file to your Desktop or Downloads folder and run the installer as described above.

Troubleshooting when the driver still will not install

If the installer runs but the driver does not work afterward, restart your computer again. Sometimes the driver needs two restarts to fully activate. Check Device Manager a second time to confirm the network adapter no longer has a warning icon.

If you get an error message during installation, write down the exact error code and search for it along with your network card model. Common errors include "driver not compatible with this version of Windows" — this means you downloaded the wrong Windows version. Go back to the manufacturer's website and download the correct version for your Windows 10 or Windows 11.

If the installer says your hardware is not found, the network card may not be recognized by your computer at all. Restart your computer and check Device Manager again. If the adapter still does not appear, the hardware may need to be replaced or serviced by a technician.

Frequently Asked Questions

How do I know if my WiFi problem is a driver problem or a hardware problem?

Open Device Manager and look at the Network adapters section. If you see a network adapter with a yellow exclamation mark or a question mark, the driver is the problem. If you see no network adapter listed at all, the hardware may not be recognized or may be damaged. Try restarting your computer first — sometimes a restart fixes the recognition issue.

Can I use Windows Update to install WiFi drivers instead of downloading from the manufacturer?

Windows Update sometimes installs drivers automatically, but it is often slower or installs an older version than the manufacturer offers. If you need WiFi working right now, download directly from the manufacturer's website. If you prefer to wait, go to Settings > Update & Security > Windows Update and click "Check for updates" — Windows may find and install a driver.

What if the driver installer says it is not compatible with my Windows version?

You downloaded the wrong version. Go back to the manufacturer's website and look for a driver labeled for your specific Windows version — Windows 10 and Windows 11 drivers are different. Check your Windows version by right-clicking "This PC" and selecting Properties. Download the correct version and try again.

Do I need to uninstall the old driver before installing a new one?

Usually no — the new installer will replace the old driver automatically. If the new driver will not install, right-click the network adapter in Device Manager, select "Uninstall device", restart your computer, then run the new installer. This removes any leftover files from the old driver.

Why does my WiFi work after installing the driver but then stops working after a few days?

Check for Windows Updates — a recent update may have overwritten your driver with an older version. Go to Settings > Update & Security > Windows Update and check for updates. You may also need to disable automatic driver updates so Windows does not replace your working driver. Search "Device installation settings" in Windows and set it to "No, let me choose what to do".