First of all, I am new to Apple and not a very technical person. Please bare with me.
A person within my network got access to my MacBook Pro through Wifi, and somehow now he can connect remotely. I cannot change the Wifi password because we both pay for it. So, my only choice so far is to avoid not to use wifi at all, until I learn on what to do to remove his fingers of my machine.
I did 3 factory reset, cleaned up all my files but as soon I am within his range he is again messing with my files. I tripled check all my security settings such as firewall, disabled infrared receiver, created a vault, even I now use a firmware password to log into my machine. I am lost and desperately in need of help :(