This Idiot Tried to Hack My System

I wonder how the hell he did it, but it sure is that he is successful, he RDP’d my ass for 50 seconds and then boom his gone. My guess that he sniffed into my open port I have set and from there I had no clue what else happened. I’ve scanned all the security holes but no luck including the firewalls and router security policy.  He disable my audio, crashed my vlc and closed the chrome.  Son of a bitch!