It seems my friend and I can't establish a connection between our PCs. As far as I know we both don't have any troubles with our clients: they are up to date and the diagnostic tool shows all greens. However, once we are in the same network we can't ping each other because it just times out, and after some settings tweaking i got an error and this message during my diagnostic of his connection to me: "cannot get adapter config". He did seem to have a VPN but even after he'd disabled it the same thing happened. I got my other friend to test and we had a stable connection, had no errors in diagnostics, no errors could ping each other etc. He also got errors during pinging and running diagnostic on the first guy. I can't find a solution on Russian forums as they only suggest to reinstall Hamachi and change some settings.