I have a 2007 Macbook. I was looking at porn. I have never dealt with anything asking for admin password. I was watching a clip and said something about an error with flash player (too fast to recognize everything) and then the websites crashed and the macosx pop up said there was an error, report error and relaunch. I just relaunched safari and it was slow loading the page. I reset safari and is still slow. But just within seconds or minutes, it was back to normal. I didn't pick up anything bad did i?