How to check if your computer's Wi-Fi adapter is working: step-by-step instructions

Have you suddenly lost internet access, and the Wi-Fi icon in the Windows system tray has a small cross? Or is your laptop simply not seeing any available networks, even though your smartphone connects without issue? A malfunction could be the cause. Wi-Fi adapter — the hardware module responsible for the wireless connection. But before taking your computer to a service center or buying a new adapter, it's worth making sure that the problem lies with this module.

In this article we will look at 7 proven methods, how to diagnose the operation of the Wi-Fi module on a PC or laptop running Windows 10/11You will learn how to check the adapter through device Manager, command line, and third-party utilities, as well as what to do if the system doesn't recognize it. The instructions are suitable for both built-in modules (in laptops) and external USB adapters from TP-Link, ASUS or D-Link.

1. Checking the physical connection of the adapter

Start with basic diagnostics—make sure the adapter is physically connected and turned on. This is especially true for external USB dongles and laptops with hardware Wi-Fi switches.

• 🔌 For USB adapters: Check if the device is firmly inserted into the port. Try connecting it to a different USB port (preferably USB 3.0 blue). If the adapter has an antenna, make sure it is not damaged.
• 💻 For laptops: Find a button or switch with an antenna icon on the case (often located on the front panel or next to the key) F2–F12). On some models Lenovo or HP Wi-Fi is turned on by a combination Fn + F2.
• 🔋 For PCs with built-in Wi-Fi card: Open the system unit and make sure the card is seated tightly in the slot. PCIe or M.2If it was removed, reinstall it.

On some laptops (eg. Dell XPS or Acer SwiftWi-Fi may be disabled in the BIOS. To check this:

1. Restart your computer and enter the BIOS (usually the key F2, Del or Esc when loading).
2. Find the section Advanced → Wireless or Onboard Devices.
3. Make sure the parameter Wi-Fi or WLAN installed in Enabled.

2. Diagnostics via Device Manager

device Manager — the main Windows tool for checking hardware components. Here you can see whether the system recognizes the Wi-Fi adapter and check its status.

To open Device Manager:

1. Click Win + X and select device Manager.
2. Expand the branch Network adapters.
3. Look for devices with names like Wireless, Wi-Fi, 802.11ac or model number (for example, Intel Wi-Fi 6 AX200, Qualcomm Atheros QCA9377).

Here's what the possible adapter statuses mean:

If the adapter is not listed at all, try:

• 🔄 Restart your computer (sometimes helps with temporary glitches).
• 🔍 Enable display of hidden devices: View → Show hidden devices.
• 🛠️ Check the adapter on another PC (if it is a USB module).

3. Checking via "Network Connections"

Another diagnostic method is to check the status of the Wi-Fi adapter in the section Network connectionsHere you can see whether the module is active and trying to connect to the network.

How to open:

1. Click Win + R, enter ncpa.cpl and press Enter.
2. Find the connection with the name Wireless network or Wireless Network Connection.

Possible statuses and their meaning:

• 🔴 The network is disconnected — the adapter is deactivated (right-click → Turn on).
• 🟡 No network connection — the adapter works, but does not find the network (check the router).
• 🟢 Connected — the adapter is working properly, but there may be problems with the Internet (DNS, IP address).
• ⚪ Unidentified network — the driver is installed incorrectly or the adapter is faulty.

If the adapter is not listed, this confirms a driver-level issue or hardware failure. Proceed to Section 4.

4. Diagnostics via the command line

Command line (CMD) allows you to get detailed information about network adapters, including their MAC addresses, status and supported standards (802.11n/ac/ax). This is useful if the Windows GUI doesn't show the full picture.

Run the following commands in order:

netsh wlan show drivers

This command will show:

• 📋 Driver type and version.
• 🔄 Supported Wi-Fi standards (e.g. 802.11n, 802.11ac).
• ⚠️ Radio module status (Radio on: Yes/No).

netsh wlan show interfaces

Here's what to pay attention to:

• 🔹 State — it should be connected or ready.
• 📶 SSID — name of the current network (if connected).
• 📊 Received/Sent - if the values ​​increase, the adapter is active.

ipconfig /all

Look for the block Wireless network adapterImportant parameters:

• 🔧 Description — adapter model.
• 🌐 Physical address — MAC address (if absent, the adapter is faulty).
• 📡 IPv4 address - if it starts with 169.254, this is a DHCP error.

If the commands return an error No wireless interfaces or an empty result—the adapter is not recognized by the system. This may mean:

• 🔌 The adapter is disabled physically or in the BIOS.
• 🖥️ No drivers (see next section).
• 💥 Hardware failure (for example, a burned-out chip on a USB adapter).

5. Checking and updating drivers

In 60% of cases, problems with the Wi-Fi adapter are related to drivers — they may be outdated, damaged, or missing altogether. Even if the adapter appears "working" in Device Manager, the driver may not be working correctly.

How to check and update the driver:

1. Open device Manager → Network adapters.
2. Right-click on the Wi-Fi adapter → Update driver.
3. Select Automatic searchIf Windows doesn't find any updates, download the driver manually from the manufacturer's website:

• 🖥️ For built-in adapters (eg. Intel, Realtek, Broadcom): look for the driver by laptop model on the website Dell, HP, Lenovo etc.
• 🔌 For USB adapters (eg. TP-Link TL-WN725N, ASUS USB-AC56): download the driver from the manufacturer's official website.

If updating doesn't help, try:

• 🔄 Reinstall the driver: In Device Manager, remove the adapter (right click → Remove device), then restart your PC - Windows will try to install the driver again.
• 📥 Install an older version: Sometimes new drivers contain bugs. Download an older version from the manufacturer's website.
• 🛠️ Use utilities for automatic updates: Driver Booster, Snappy Driver Installer (but be careful with software from unknown sources!).

Make sure the adapter is displayed in Device Manager|Try updating the driver automatically|Download the driver from the manufacturer's official website|Restart the PC after installing the driver|Test the adapter in safe mode-->

Critical information: If the adapter disappears from the Device Manager after reinstalling the driver, this may indicate a hardware failure (for example, a chip failure on the USB adapter or a damaged antenna in the laptop).

6. Testing the adapter on another device

If all software diagnostics fail, the next step is to test the adapter on another computer. This will help determine whether the problem lies with the module itself or your PC.

How to conduct the test:

• 🔌 For USB adapters: Connect it to another PC or laptop. If Wi-Fi works, the problem is with your computer (possibly a conflict with other hardware or the BIOS).
• 💻 For built-in adapters (laptops): If possible, connect your laptop's hard drive to another device (via a docking station) and check the Wi-Fi connection. Alternatively, use Live USB with Linux (for example, Ubuntu) to rule out problems with Windows.

If the adapter does not work on any device:

• 🛒 For USB modules: the adapter is most likely broken. The cost of a new one (for example, TP-Link TL-WN823N) — from 500 rubles.
• 🔧 For built-in modules: Contact a service center. Replacing the Wi-Fi card in a laptop will cost 1,500–3,000 rubles (depending on the model).

7. Using third-party diagnostic utilities

If standard Windows tools don't provide a complete picture, use specialized programs. They will display detailed information about the adapter, signal strength, and possible errors.

Useful utilities:

Example of diagnostics in HWInfo:

1. Run the program and select Sensors.
2. Find the section Network or the name of your adapter.
3. Check the parameters:
   • Link Speed — current speed (for example, 866 Mbps For Wi-Fi 5).
   • Signal Strength — signal level (below 30% - weak signal).
   • Temperature - if higher 70°C, the adapter is overheating.

If the utilities show that the adapter does not transmit data (For example, Packets Sent: 0), this confirms its malfunction.

Frequently Asked Questions (FAQ)

lspci | grep -i network

lsusb

sudo apt install firmware-<chipset_name>

sudo apt install rtl8821ce-dkms

If none of these methods help diagnose the adapter, or it is clearly faulty, consider alternative internet connection options: USB modem, Ethernet adapter (for laptops via USB→RJ45) or Powerline (Internet via electrical wiring).