How can you prevent someone from hacking into your computer system?
I had a "friend" on my msn, who hacked into my system whenever we chatted and would do some evil things to it, like open a **** website or view my files. i blocked him from my life.. and now i have to add him again after 6yrs to solve our past issues. is there a way i can prevent this from happening? i dont know if i can trust him. i have to be safe. please help!