Ok, so I was trying to watch an episode of a show I missed, something came up and said I needed a codec and I clicked (STUPID, Yes, I am, I know...). Nothing came out though and I don't recall actually typing in my administrative password. So now, Safari and Firefox will redirect me whenever I search for something on a search engine. I get redirected to a weird site that has similar search results. Also, sometimes when I type in an address on the address bar it will take me somewhere else. I looked up a bunch of stuff online about this and it sounds like that DNSchanger trojan. The places I read that spoke about this said you can see if you're 'infected' by doing certain things, like looking to see if there's a specific file on your Internet Pluggins folder, or looking up crontabs on Terminal, as well as checking your DNS on the Network Preferences of AirPort. HOWEVER, every time I search for this, there's nothing there, in any of them. No crontabs, no weird thing on DNS, no 'pluggins.settings' on my Internet Pluggins folder...nothing. I have Norton Internet Security and though I ran it various times and it found/deleted 'trojans' and a 'zango adware' thing, Safari keeps doing this whole redirect thing every time I search or every once in a while when I type something in the address bar. It's super annoying and I don't know what to do and if this is affecting my computer somehow or damaging it in a way I don't know and can't see. I'm not sure if this question was answered before, though I did try to look before I posted. I could only find a thread about it being highjacked but the user's problem was solved fairly quickly and the advice given was of no use to me. I'd really REALLY appreciate the help. Thanks.
MacBook Pro, Mac OS X (10.6.3), Intel Core 2 Duo