When a computer stops detecting its Wi-Fi adapter, it often takes users by surprise, cutting off internet and local network access. This can happen after an operating system update, a power surge, or simply due to a software glitch. It's important not to panic, but to check the hardware and software settings one by one.
In most cases, the problem lies in the software, which can be resolved without calling a technician. However, ignoring hardware symptoms may require module replacement. Below, we'll discuss the basic methods for diagnosing and restoring the wireless module.
Initial diagnostics and physical connection
Before delving into complex operating system settings, it's important to rule out simple causes. Users often forget that the module could have been disabled mechanically or programmatically via hotkeys. If you're using a laptop, check for a physical switch on the case or a hotkey combination with an antenna icon. On desktop computers, ensure the USB dongle is securely inserted into the port.
Pay attention to the indicators. If the adapter has an LED, it should be lit or blinking. A lack of response may indicate a power outage or a faulty port. Try reconnecting the device to a different USB port, preferably located directly on the motherboard at the rear of the system unit.
⚠️ Caution: If you're using a USB extension cable, try connecting the adapter directly to your computer. Long, low-quality cables may not provide sufficient voltage to operate the module.
In some cases, a simple system reboot can help. This clears temporary hardware initialization errors. If Windows still doesn't detect the Wi-Fi adapter after rebooting, proceed to software diagnostics.
Checking Device Manager and Hidden Adapters
The central place for managing hardware in Windows is the Device Manager. To get there, right-click the Start button and select the appropriate option. Find the section in the list Network adaptersIf your Wi-Fi module is there but marked with a yellow exclamation mark, it means the system sees it but can't launch it correctly.
The situation may be different: the adapter is completely missing from the list. In this case, try displaying hidden devices. In the Device Manager menu, click View → Show hidden devicesIf the module appears translucent, it was disabled or removed programmatically. Double-clicking the device will open its properties window, where the error code will be displayed in the "Device Status" field.
- 🔴 Code 10 or 43 - the device cannot start (often a driver problem).
- 🔴 Code 45 — the device is not connected to the computer (physical contact problem).
- 🔴 Code 28 - Drivers not installed.
If the adapter is displayed as "Unknown Device" with a yellow triangle, this is a sure sign of missing drivers. In this case, Windows doesn't know how to communicate with the hardware. You need to find and install the appropriate software.
Installing and updating drivers
Missing or incorrectly installed drivers are the most common reason why a computer doesn't detect a Wi-Fi adapter. A driver is the intermediary between the operating system and the hardware. Without it, the module is just a piece of plastic and metal.
The best solution is to download the latest driver from the official website of your laptop or motherboard manufacturer. Using third-party auto-installers often results in unstable versions. If you don't have internet access on your PC, use your smartphone or another computer to download the file.
| Device type | Where to look for the driver | An important nuance |
|---|---|---|
| Laptop (HP, Dell, Asus) | Official support website for the model | I need the exact laptop model. |
| External USB adapter | Chip manufacturer's website (Realtek, TP-Link) | The hardware revision version is important |
| Prefabricated PC (PCI-E) | Motherboard manufacturer's website | Search in the LAN/Wireless section |
After installing the driver, be sure to reboot. If the installation was successful, the exclamation marks in Device Manager will disappear, and the Wi-Fi icon will appear in the system tray. If the system reports that "the best drivers are already installed" but the device isn't working, try removing the device from Device Manager and clicking "Scan for hardware changes."
☑️ Checking drivers
Configuring Windows services and power options
A special service is responsible for wireless networking in Windows. If it is disabled or stopped, the adapter will not function, even with correct drivers. Click Win + R, enter services.msc and find it in the list WLAN AutoConfig Service.
Double-click the service. The startup type should be set to "Automatic" and the status to "Running." If not, change the settings and click "Apply." Often, after a system update, the settings are reset to "Manual," which prevents the module from working.
Another hidden cause is power saving mode. Windows may turn off the adapter to save power, but it won't wake it back up. In Device Manager, open the Wi-Fi adapter's properties and go to the tab. Power management and uncheck the box next to "Allow the computer to turn off this device to save power."
⚠️ Note: Service interfaces and power options may vary slightly depending on your Windows version (10, 11) and updates. If you don't find the exact service name, look for a similar one containing the words "WLAN" or "Wireless."
Reset network settings and BIOS
Sometimes software leaks accumulate in the OS's network settings. Windows 10 and 11 have a built-in hard reset feature. Go to Settings → Network & Internet → Advanced network settings → Network resetThis action will delete all saved Wi-Fi passwords and reset the network settings to factory defaults.
A deeper level of configuration is the motherboard BIOS/UEFI. The integrated Wi-Fi module may be disabled at the hardware level. To check, enter the BIOS when booting the computer (usually by pressing Del, F2, or F10). Find the section related to Peripherals or Onboard Devices.
Look for items containing the words Wireless, WLAN or Wi-Fi Controller. Make sure they are in good condition. EnabledIf the module is disabled in the BIOS, no actions in Windows will help activate it.
How to reset TCP/IP settings using the command line
Open Command Prompt as administrator. Enter the command: netsh int ip reset. Then enter: netsh winsock reset. After running the commands, be sure to restart your computer.
Hardware malfunctions and module replacement
If software solutions don't help, there's a high probability of a hardware problem. Internal modules in laptops often fail due to overheating or power surges. In such cases, the computer stops detecting the device even in Device Manager.
To diagnose the problem, you can try connecting the adapter to another computer. If it's still not detected, the module is faulty. With laptops, carefully removing the Wi-Fi card, cleaning the contacts with an eraser, and reinserting it can sometimes help. However, this requires disassembly skills.
The simplest and most reliable solution if the built-in module fails is to purchase an external USB Wi-Fi adapter. This device works like a regular flash drive and allows you to restore network access without complex laptop repairs.
- 📡 External adapters are compact and do not require opening the case.
- 📡 They are universal and suitable for any PC with a USB port.
- 📡 Often have more powerful antennas than built-in modules.
Why did Wi-Fi disappear after a Windows update?
Windows updates often contain new driver versions that may conflict with your current hardware configuration. An update may also reset service settings or change power policies. In rare cases, the update itself may become corrupted.
Can a virus disable a Wi-Fi adapter?
Yes, some types of malware block network access to prevent virus removal or data transfer. In such cases, an antivirus scan and resetting network settings usually resolve the issue.
What should I do if there are no drivers for my version of Windows?
Try installing the driver for the previous version of Windows in compatibility mode. You can also use generic drivers from the chipset manufacturer (such as Intel or Realtek) rather than those from the laptop manufacturer.