Connections issues with my Minecraft Laucher

Minecraft is always offline and i can't connect my account (E-Mail + Password) or download the new updates with my WiFi. Only my computer has that problem in my family and the only alternative to update stuff is to use my 4G. I did find some interesting information in the Debug.log :

"
[0329/132922.082:WARNING:dns_config_service_win.cc(669)] Failed to read DnsConfig.
....
[0507/001218.240:WARNING:dns_config_service_win.cc(669)] Failed to read DnsConfig."

 

(Yes, I've been struggling with this issue since March... there is quite a lot of lines)

Is there a solution ? Or do I have to use my 4G for now ?

 

Ps. Please do not ask me to uninstall Minecraft, I already did that and i couldn't load the Minecraft Launcher anymore.

Ps2. I can take some screenshots if needed