Limited Access Windows 7 Wifi

re
maybe the fastest way would be to call Free (3244)

Hello
If I understood correctly (not sure), you are trying to get internet (via Wi-Fi)
The Wi-Fi works but there is no internet access
Either the signal is too weak --> no internet
Or the signal is strong but on the freewifi network (outside your home) there is an additional code that Free provided you (Wi-Fi credentials) (or can be found on your account
Without this code, no internet

However, from your home, on your Freebox network it should work without a code if there are no walls or obstacles between the box and the PC, and if you entered the key (WAP or WEP) located on the box screen (navigate through the menus
Depending on your PC's network card system, you may be asked to enter a different number of characters than that of the key, as indicated on the box; in that case, you'll need to modify the type of key (on your account) and add zeros in front, for example
If this is the case, ask Free at 3244 because you will then need to modify this key on all other connected devices

I am not talking about free-secure which is something else)

First of all, I want to thank you for your quick response.

Yes, you understood correctly, the Freebox is mine, and both computers are connected via Wifi, the Mac which works very well, and this Windows PC which functioned at first when I turned it on, but when I uninstalled some antivirus (Avira, AVG) and cleaned up with Malwarebytes and CCleaner, it stopped working. Could there be a link with the firewall or something in the antivirus that should have been uninstalled or disabled during the uninstallation?

There is a password to connect to Wifi, I entered it, it was accepted but remains limited; as for the network card of the PC, I did not receive any request for a specific code.

This is really a complicated case, I'm apparently not the only one :/

re
I doubt that Malwarebytes has removed anything
I have more doubts about CCleaner for deleting files wrongly marked as "not used by any applications"
I think we need to review the network card configuration

First, check if you have any alerts about it in the Device Manager (you never know)
If necessary, update the driver
Do you see the list of available networks properly?
Turn off the Wi-Fi (disable it) then restart the box, as soon as the time is displayed (normal mode) re-enable the Wi-Fi
How does it look?

Device Manager > Network Adapter > both are working properly
I did the Wi-Fi manipulation, still nothing

What's strange is that when I type ipconfig in cmd, it shows me media disconnected.

Great.. plus they are nice at Free, that doesn't spoil anything.