Hey, this is my first post so I hope I'm putting it into the correct forum. My apologies if I'm wrong. I have a MacBook. Today while I was on Myspace, a pop-up window and a new tab opened informing me that GTSCAN was performing a scan of my computer. This is weird because I was on my own page (shouldn't have been a phishing site) and I have my block pop-up windows option enabled. Was this a virus? How do I know if my computer was compromised in any way (such as my information or identity stuff stolen)? I don't have security stuff on my laptop because I was always told Macs don't need it and that it would actually slow up and gunk up my computer. Help?