>>236319To have access to your screen, he would have some kind of connection like VNC or RDP, this is possible, but he would have to get you to install/activate on your end. So he must have either coerced you to run malicious code by phishing of some sort or gained access to your wifi and use a MitM attack.
Fortunately for you, you can scan your ip with something like nmap from a different pc while you run your regular pc. Any odd port numbers could indicate a program listening for connections to send your screen.
Other ways could include hacking you via some sort of zero day, but this seems unlikely. And instead of a vnc/rdp type program where he can follow your actions live, it could also just be sending periodical screenshots.
If any of this is the case, I recommend a full system wipe and settting a new wifi password. WPA2 AES without wps enabled. That should take way too much effort to crack/hack.
