Hello, I'm fairly new to the Mac OS X (2 months) and I already managed to get myself a keylogger from somewhere I don't know. After recovering my e-mail password it got immediately changed by someone unknown. The same happened with several online accounts I had on other places. I had installed Sophos antivirus as soon as I got my new MacBook, but it didn't seem to work very well afterall. As a last resort I decided to delete the whole hard drive, along with my portable drives aswell. This was the very first time this happened to me, it had never happened when using Windows. Anyway, my question is; is there any other app (good preferably) than Sophos to prevent this ever happening again? Or are there any other measurements I should take into account when using this Mac in the future? I'm seriously considering installing Windows on this Mac as the sole OS if the Mac OS X turns out being this unsafe. I am also using Common Sense 2011 as virus protection, so don't blame me on that.