Hello everyone. This is my first post on this board. I have a few questions. ANY HELP WOULD BE GREATLY APPRECIATED. Today I realized that the whole time I've had my mac, my firewall has been on "Allow all incoming connections," in other words my firewall has been off. This is very concerning to me and I wanted to know how vulnerable this makes me to being hacked. I need to make sure I havent been hacked in anyway. If I get a virus scanner and it finds nothing, is that enough to conclude I've never been hacked? Or do hackers removes trojans and keyloggers once they're done with their malicious activities? Is the only way to be hacked by downloading a dangerous file? Another question I have is what are the default settings for "Sharing" under system preferences. Are all the selections supposed to be unchecked? Such as file sharing, screen sharing, remote login etc. My computer would alert me if someone tried to gain access through any of these means right? I have a fear that since I have had my firewall down someone has been watching everything I do on my computer since I received this computer a year ago. Please help!