I'm a bit of a technical hypochondriac I suppose. I don't know much about flashback, but that it comes from Java in your browser. I was on a website tonight, and I think it was one of the website's ads that came up, but that site usually doesn't have ads. It was odd, and sounded like my Mac made an odd sound. Overthinking things I'm sure, but how would I know if I had a rare Mac virus, such as flashback?