How to enable Wi-Fi on a Lenovo B575 laptop: all the methods from simple to complex

Laptop Lenovo B575 — a reliable workhorse, but even with it, Wi-Fi connection issues sometimes arise. Did you click the network icon in the system tray and see "No available connections" or no network list at all? Don't rush to blame the router or ISP. In 80% of cases, the problem lies with a disabled Wi-Fi adapter, and it can be resolved in a couple of minutes without calling a service center.

This article is a complete guide on how to activate Wi-Fi on Lenovo B575 We'll cover all possible methods: from basic (button on the case, key combinations) to advanced (BIOS settings, driver diagnostics). We'll also cover common errors that can prevent the network from turning on and provide a quick checklist. If you're unsure which method you need, start with the first section—it contains a test that will help pinpoint the root of the problem.

Important: Lenovo B575 was produced in several modifications (for example, B575e, B575-4334), but the instructions in this article are universal for all versions. The only difference is the location of the physical Wi-Fi button (more on this in the section on hardware activation).

1. Quick check: Is Wi-Fi enabled on Lenovo B575?

Before digging deeper, make sure the problem is with your laptop, not your router or network settings. Here are three quick diagnostic steps:

• 🔍 Check the Wi-Fi indicator on the laptop case (usually near the power button or on the front panel). If it does not burn or blinking orange - the adapter is physically disconnected.
• 📶 Make sure other devices (smartphone, tablet) see your network. If not, the problem is with the router, not Lenovo B575.
• ⚡ Try restarting your laptop.Sometimes a simple reboot can fix an adapter malfunction (especially if the device was previously in sleep/hibernation mode).

If Wi-Fi still doesn't appear after these steps, proceed to the next sections. If the network is available again, the issue was temporary and there's no need to worry. However, to avoid recurring issues, we recommend updating the adapter driver (section 5).

2. Hardware Wi-Fi activation: buttons and switches

On Lenovo B575 Wi-Fi can be physically enabled using a dedicated button or key combination. This is the quickest way if the adapter is disabled at the hardware level. Here's where to find the switches:

• 🔘 Button on the front panel (to the right of the touchpad or next to the indicators). On some models, it is combined with a button. Bluetooth and is signed with an antenna icon 📶.
• 🔑 Keyboard shortcut Fn + F5 (or Fn + F2 on some versions). On the key F5 There should be a wireless network icon drawn.
• 🔄 Switch on the side panel (rare, but found in early batches B575). Usually located next to the USB ports.

After pressing the button, wait 5-10 seconds – a notification indicating Wi-Fi is enabled should appear (in the lower right corner of the screen). If nothing happens:

1. Make sure your laptop is not in Airplane mode (airplane icon in the tray).
2. Check if the Wi-Fi indicator on the case is lit (if yes, the adapter is enabled; if not, try a different key combination).
3. If the button does not respond, it may be locked in the BIOS (see section 4).

3. Enabling Wi-Fi via Windows (if the adapter is disabled by software)

If the physical button doesn't help, check your wireless network settings in Windows. Often, the adapter is accidentally disabled through the Network and Sharing Center or third-party utilities (for example, Lenovo Energy Management). Follow the instructions:

1. Click Win + R, enter ncpa.cpl and press EnterThe Network Connections window will open.
2. Find the item Wireless Network (Wireless Network Connection). If it is gray and has the inscription Disabled - right click and select Turn on.
3. If the adapter is not in the list at all, proceed to section 5 (problem with drivers).

Also check if the network is disabled in Windows Settings:

1. Open Start → Settings → Network & Internet → Wi-Fi.
2. Make sure the slider is «Wi-Fi» is in position On.
3. If there is a section Data transfer services — check that everything is included there too.

If after these manipulations Wi-Fi does not work, and the adapter remains disabled in "Network Connections", try restarting the service WLAN AutoConfig:

1. Press Win + R → enter services.msc → Enter.
2. Find the "WLAN Automatic Configuration Service" service.
3. Right-click → “Restart”.

Make sure the adapter is enabled in Network Connections | Check the Wi-Fi slider in Windows Settings | Restart the WLAN AutoConfig service | Update the adapter driver (if necessary) -->

4. Setting up Wi-Fi in BIOS (if the adapter is blocked)

On some Lenovo B575 Wi-Fi may be disabled at the BIOS level—for example, after a factory reset or firmware update. In this case, neither the buttons on the case nor the Windows settings will help. To check and enable the adapter in the BIOS:

1. Turn off your laptop, then turn it on and immediately press repeatedly F2 (or Del, If F2 (doesn't work) to enter BIOS.
2. Go to the section Advanced → Wireless (or Configuration → Network, depending on the BIOS version).
3. Find the parameter Wireless LAN (or WLAN) and set the value Enabled.
4. Save changes (F10 → Yes) and restart the laptop.

If there is no item in BIOS Wireless, then the adapter is being blocked at a different level. Return to sections 2 or 3.

⚠️ Warning: Changing BIOS settings may affect the stability of your laptop. Do not change other settings unless you are sure of their purpose. If, after saving the settings, Lenovo B575 stopped booting - reset the BIOS to factory settings (remove the CMOS battery on the motherboard or use a jumper CLR_CMOS).

5. Update and reinstall the Wi-Fi driver

If the adapter does not turn on or works unstable, the cause is often an outdated or damaged driver. Lenovo B575 an adapter is usually installed Broadcom, Realtek or AtherosTo update the driver:

1. Click Win + X → device Manager.
2. Expand the section Network Adapters.
3. Find the device with the names Wireless, WLAN or 802.11 (For example, Broadcom 802.11n Network Adapter).
4. Right click → Update driver → Automatic search.

If Windows does not find updates, download the driver manually:

• 🌐 From the official website Lenovo (support section, enter model B575).
• 🔧 From the adapter manufacturer's website (for example, Broadcom or Realtek).
• 💾 Using the utility Lenovo System Update (if installed).

If Wi-Fi still doesn't work after updating, try remove the driver completely and reinstall it:

1. In the Device Manager, right-click on the adapter → Remove device.
2. Check the box Remove the driver software for this device (if any).
3. Restart your laptop - Windows should automatically reinstall the driver.

⚠️ Attention: If after uninstalling the driver the Wi-Fi adapter disappears from the Device Manager and does not appear after rebooting, this may indicate hardware failure (for example, antenna failure or module malfunction). In this case, contact the service center.

How can I find out the exact model of my Wi-Fi adapter?

Open Device Manager → Network Adapters → right-click on the adapter → Properties → Details tab → select Hardware IDs. The top line will display a code like this: PCI\VEN_14E4 — the first 4 characters after VEN_ will indicate the manufacturer (for example, 14E4 - This Broadcom).

6. Troubleshooting Common Wi-Fi Errors on the Lenovo B575

Even if the adapter is enabled, you may encounter other problems. Here are the most common errors and their solutions:

🔴 Error: "No connections available"

Cause: The adapter is turned on but doesn't detect the network. This could be due to:

• Incorrect region in the router settings (for example, selected USA, and you are in Russia).
• Hidden network (SSID hidden) - you need to manually add the network in Windows.
• Router malfunction (reboot it).

Solution: Try connecting to the network from another device. If that doesn't help, reset your router to factory settings.

🔴 Error: "Connected, no internet access"

Cause: The laptop connects to the router but does not receive an IP address or cannot contact the DNS server.

Solution:

1. Open Command Prompt (Win + R → cmd → Enter).
2. Enter in turn:

   ipconfig /release
   ipconfig /renew
   ipconfig /flushdns

3. Restart your laptop.

🔴 Error: "Windows couldn't connect to the network"

Cause: Incorrect security settings (for example, incorrect password or encryption type).

Solution: Remove the network from the list of saved networks and reconnect:

1. Open Settings → Network & Internet → Wi-Fi → Manage known networks.
2. Select your network → Forget.
3. Please reconnect by entering your password.

Lenovo B575 Wi-Fi FAQ

🔹 Why did Wi-Fi stop working after a Windows update?

Windows updates sometimes reset drivers or network settings. Try:

1. Roll back the adapter driver (in Device Manager → Properties → Roll Back).
2. Install the driver from the official website Lenovo (not via Windows Update).
3. Check if legacy compatibility mode is enabled in your router settings.

🔹 Is it possible to turn on Wi-Fi if the button on the case is broken?

Yes, there are several ways:

• Via a keyboard shortcut Fn + F5 (or another function key with a Wi-Fi icon).
• Through Windows Network and Sharing Center (section 3).
• Via BIOS (section 4), if the button blocks the adapter at the hardware level.

If the button is mechanically broken, it can be replaced at a service center or an external USB-Wi-Fi adapter can be used.

🔹 How to reset network settings on Lenovo B575?

To reset all network settings to factory defaults:

1. Go to Settings → Network & Internet → Status → Network reset.
2. Click Reset now and confirm the action.
3. After restarting your laptop, all saved networks and adapter settings will be deleted.

⚠️ After the reset, you will have to re-enter your Wi-Fi passwords.

🔹 Why is Wi-Fi slow on my Lenovo B575?

Reasons for slow performance:

• An outdated Wi-Fi standard (eg. 802.11g instead of 802.11n).
• Router channel overload (try changing the channel in the router settings to 1, 6 or 11).
• Weak signal (check the distance to the router or use a repeater).
• Background downloads (open Task Manager and check if anything is loading the network).

Also, updating the adapter driver can improve speed.

🔹 Is it possible to replace the Wi-Fi module on a Lenovo B575?

Yes, but with some caveats:

• 🔧 Lenovo B575 supports modules of the format Mini PCIe (half-size).
• 🛠️ Compatible models: Broadcom BCM94313, Intel Centrino Advanced-N 6205, Atheros AR9285.
• ⚠️ Before replacing, disconnect the battery and power supply!
• 📄 After replacement, you may need to install drivers.

If you are not confident in your abilities, it is better to contact a service center.