Hi there, I have some questions concerning security on os x. First I try to explain why security recently has become more important to me: About two weeks ago my parents' windows pc was infected with a few trojans. They asked me to delete them, but also to check their pc for other malware. So I did some scans with several programs (Avira Antivirus, Malwarebytes AM, etc.). In the end I found a ZeroAccess Rootkit which is - according to the statements in many forums - very difficult to delete completely. Now you might ask yourself: "What does this have to do with my macbook?" The thing is that I can't rule out that malware hasn't been transferred from the infected windows pc to my macbook pro via network or external storage media. All I can say is: I didn't configure my macbook after the installation (firewall was turned off, java was active in the browser, etc.) I definitely didn't follow the steps of the malware guide in this forum. My questions are as follows: 1) Let's assume, that my macbook has been infected with malware (rootkit, etc.) via the home network. How would I know of it and what steps would I have to follow to delete it (completely)? Is it possible to run a system with a inactive rootkit in case it couldn't be found/deleted? 2) Did anyone of you have issues with Little Snitch? My parents' pc got infected with malware not long after I had installed Little Snitch on my macbook. Do you think that these two events have a connection? 3) One day after malware was found on the windows system I tried to turn on my macbook pro. It was only after the third try that the macbook booted up. Maybe I didn't put enough pressure on the power button or it just was stuck down, for whatever reason. However, could this issue be explained by a rootkit on my macbook pro? Or is Little Snitch to blame as it modifies among other things the boot caches on os x? I'd appreciate any help.