Unable to turn on the Wi-Fi connection - Windows 8.1

Hello Loïc,

Welcome to Microsoft Community Forum.

As per the description I understand that you are not able to turn on the Wi-Fi connection. I will certainly help you with this issue.

This issue might occurs due to incorrect settings or due to corruption in the wireless drivers. Let’s try to identify the actual cause and troubleshoot accordingly.

However, before we proceed I would require some more information to assist you better.

Do you remember making any changes to the system prior to this issue?

I would suggest you to try the following methods:

Method 1:

Step 1:

Turn on network discovery and check whether it helps to fix the issue.

To do so, please follow the steps below:

a. Press Windows key + X and select control panel. In the search box, type network, click Network and Sharing Center and then, in the navigation pane, click Change advanced sharing settings.

b. Click the chevron to expand the current network profile.

c. Click Turn on network discovery and then click Save changes.

Note: If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

Step 2:

Please check the status of the WLAN Autoconfig service. The status should be started and set to automatic.

To do so, follow the steps given below: 

a. Press Windows key + R, Run window will be open

b. Type in services.msc in Open box and click on Ok.

c. Select WLAN Autoconfig from the list, right click on it click on “Start”.

Note: If it is already started, then I suggest you to right click on WLAN Autoconfig and click on restart.

d. Right click on WLAN Autoconfig and select properties.

e. Change the startup type to Automatic.

f. Click on Apply, Ok.

g. Restart the computer and check if it helps.

If issue still persists, then try method 2.

Method 2:

Run the network troubleshooter to diagnose and repair any problem related to your network.

Refer the link for more information: Why can’t I connect to a network?

Also see: Wired and wireless network problems

Hope the information helps. Let us know if you need further assistance with Windows related issues, we’ll be glad to assist you.

Thank you