Hi Aall, I just purchased my new 27inch iMac basic model upgraded to 8gigs of rAM. While the computer is a beauty, this being my first MAC, i have a lot to learn ahead of me. Here's my first of many questions. This morning, as I was on hotmail, I guess I accidentally clicked on one of their stupid advertisements and it automatically downloaded some some malware protector. Luckily, I didn't click on install. But it just automatically installed the file (MPKG?) to my DOWNLOAD folder. My question is: how do I make the MAC warn me before downloading? I know that MACs are generally free of virus and malware. But what happened this morning got me a little worried. Thanks in advance!