Hey guys, So my MBP 2011 edition (13') is 3 weeks old, hasnt been used much. Today I was surfing google images of pictures of southern italy as Ill be flying there next month (honest to God, I wasn't looking at porn!!!). All of a sudden I got some worms/trojans and the message popped up telling me my computer is infected. Automatically a MacGuard anti-virus program began downloading. I scanned my computer and it identified some worms/trojans/viruses (not sure what the difference is). I tried to "clean" my pc, but it told me I had to register the product, which required me to buy it obviously (around $80). The risk level of the viruses was medium, and every few minutes my safari would open up on web pages for Viagra ads, Lady Gaga, Gay porn, etc. Seeing how my pc is new and I had very little installed on, I just erased the hardrive and reinstalled everything. Took me 4 hours, but my computer works like new now. Is there any software I should consider downloading to prevent this happening again? I'm seriously thinking about buying MacGuard, but one of the reasons I got the Mac was because I thought they were more impervious to these sorts of things. I could understand if I was looking at porn or questionable websites, but I wasnt. Any advice? Should I use a different browser than Safari? Thank you very much in advance!