this software cannot be used at the same time as the game.......Proxifier

Thank you all so much for the great support — it’s been really helpful! 

I ended up reinstalling my computer (unfortunately, without success), but a friend managed to figure it out!
So, for anyone who might find themselves in the same situation, here’s the solution:

Run CMD as Administrator
Click on Start, type cmd,
Right-click Command Prompt → select Run as administrator

Enter the following commands one by one:
sc query ProxifierDrv
sc config ProxifierDrv start= demand
sc stop ProxifierDrv

That’s it! 🧙‍♂️