Like an idiot i allowed my Neighbor use my wifi until i found hidden devices During an ARP scan. One day i had wireshark scanning when suddenly a new device connected to network and my time date changed. This was back about a month ago. This goes much deeper than that. I believe he had access for months at least thats what the router logs tell me. He denies it but im not stupid plus while he was away from his apartment his 2 devices were removed from my network when his Electricity suddenly went out. Plus i connected a new Wifi modem/router to my pc without any access to internet and his server or whatever hacked it in less than 5 minutes bombarding it with empty packets and malware. I cant keep this guy out. As soon as i get him out he will get back in when he realizes hes no longer online. My 10yr old sons tablet has system apps that dont belong which hes using to track whatever as well as my Pixel XL which is being replaced by google for one that i can root. I switched router 3 times now. Reinstalled windows and linux from a clean slate. Only thing i can think of is maybe he changed the iso files of windows n linux during the download. Help!!