How to Fix Error Code 43 for WiFi Driver on Windows? (Step-by-Step Guide)

When your computer shows Error Code 43 for the WiFi driver, your internet stops working. This means no browsing, no streaming, and no online games. It’s a frustrating problem because it breaks your connection and interrupts your work or entertainment. In this guide, you’ll learn what the error means, why it happens, and simple ways to fix and prevent it from coming back.

What is Error Code 43 for the WiFi Driver on Windows?

Error Code 43 is a message from Windows that says, “Windows has stopped this device because it has faced some problems.” In simple words, your operating system cannot use the WiFi adapter because the driver or hardware is not working correctly. This can happen on both built-in network cards and USB WiFi adapters.

You typically see this error in Device Manager, next to your wireless adapter, marked by a small yellow triangle icon. It may also appear when you click on the WiFi icon in the taskbar and notice that no networks are available. Sometimes Windows will pop up a notification saying the device has stopped working.

Common Causes of Error Code 43 for the WiFi Driver

There are many reasons why Windows shows this error. Most of them come from driver conflicts, hardware faults, or system settings. Here are the most common causes:

• Outdated or corrupted WiFi driver software
• The wrong driver version was installed after a Windows Update
• Faulty or loose USB WiFi adapter connection
• Device disabled in BIOS or system configuration
• Power management settings are turning off the adapter
• Conflicts with VPN software or third-party firewall
• Physical hardware failure of the wireless card or network adapter

How to Fix Error Code 43 for WiFi Driver on Windows?

Error Code 43 can arise from various issues, but Windows provides different methods to resolve it. Try these fixes one by one until your WiFi adapter works again.

Fix #1: Restart the PC and the Device

Sometimes the error is temporary. Restarting your device forces Windows to reload the driver and reconnect the hardware. After a restart, the adapter usually functions normally without further action.

Fix #2: Re-enable WiFi Adapter in Device Manager

Disabling and enabling the device refreshes its driver connection. This clears minor faults and lets Windows reinitialize the adapter.

Here are the steps you can follow to re-enable the WiFi Adapter:

1. Press Windows + X and select Device Manager.
2. Expand Network adapters.
3. Right-click your WiFi adapter and select Disable device.
4. Please wait a few seconds, then right-click the device again and select ‘Enable device‘.
5. Check if the WiFi starts working.

Fix #3: Update WiFi Driver

Old or corrupted drivers are one of the main reasons for Error Code 43. Updating the driver makes sure Windows is using the latest version from the manufacturer. Once updated, the adapter can run without reporting errors.

Follow the given Steps to do it:

1. Open Device Manager.
2. Right-click your WiFi adapter under Network adapters.
3. Select Update driver.
4. Select ‘Search automatically for drivers’ to let Windows find the latest version.
5. Restart your PC after the update.

Fix #4: Roll Back Driver

If the error started right after a Windows Update or driver update, the new version may be unstable. Rolling back to the previous driver restores the working version and clears the error.

Below are the steps to do this action:

1. Open Device Manager.
2. Right-click the WiFi adapter and select Properties.
3. Go to the Driver tab.
4. Click Roll Back Driver if the option is available.
5. Restart your computer.

Fix #5: Uninstall and Reinstall Driver

When the driver files are badly corrupted, a fresh install is the best solution. Removing the driver clears broken files, and reinstalling gives you a clean setup.

Follow these Steps to do it:

1. Open Device Manager.
2. Right-click your WiFi adapter and choose Uninstall device.
3. Confirm the action and restart your PC.
4. Windows will try to reinstall the essential driver automatically.
5. If it doesn’t work, download the latest version from Intel, Realtek, or your laptop manufacturer and install it manually.

Fix #6: Check BIOS or UEFI Settings

Sometimes the WiFi card is disabled at the hardware level. This usually happens after firmware updates or power resets. Enabling it again in the BIOS or UEFI allows Windows to recognize the device.

You need to restart your computer, press the correct key (such as F2, F10, or Del) during boot, and then open the BIOS or UEFI settings. Look under Wireless or Integrated Peripherals to confirm the WiFi adapter is enabled. Save changes and reboot.

Fix #7: Reset Network Settings

If the error is caused by system conflicts or TCP/IP problems, resetting the network stack clears them. After the Reset, Windows rebuilds the network configuration, and the WiFi driver can run properly again.

Here are the Steps to do it:

1. Press Windows + I to open Settings.
2. Go to Network & Internet.
3. Scroll down and select Network reset.
4. Click Reset now and confirm.
5. Automatically, your PC will restart and rebuild the network settings.

Fix #8: Replace the WiFi Adapter

If none of the fixes work, the hardware itself may be faulty or non functionable. This is common in older laptops or damaged USB WiFi dongles. Replacing the adapter with a new one restores connectivity and obliterates the error.

Prevention Tips to Avoid Network Errors in the Future

Once you fix the Error Code 43 on your device, you probably don’t want it in the future. A few simple tips help you to prevent it in the future. Here are some tips you can follow:

• Keep Windows updated to the latest version
• Download WiFi drivers from trusted sources like Intel, Realtek, or Broadcom
• Avoid using third-party driver updater tools that may install the wrong versions
• Restart your computer and router at least once a week
• Turn off aggressive power-saving modes for network devices in Device Manager
• If you use a USB WiFi adapter, remove it safely before unplugging
• Run monthly system checks with built-in Windows troubleshooting tools

Conclusion

Error Code 43 for WiFi drivers happens when Windows stops your wireless adapter due to driver problems, system conflicts, or hardware failure. It appears in Device Manager and blocks your computer from connecting to any wireless network.

The good news is that most cases can be solved with simple driver updates, system resets, or hardware checks. If the error persists, replacing the adapter or contacting Microsoft or your PC manufacturer may be the final step for the solution. Follow the fixes outlined in this article and the prevention tips to help your WiFi connection stay stable and ready whenever you need it.