I have a Macbook and I operate under Tiger. Occasionally when I'm trying to go to a webpage, I get redirected to wsearch.net. There are also a lot of pop-ups that come up when wsearch.net loads.

From what I've read this is a trojan. So I downloaded DNS Changer and looked for it but nothing could be found.

I've also seen that it could be a problem with the modem, but my 3 roommates are connected to the same wireless and not experiencing any problems (though none of them have Mac's)

Any insight as to if this is something I should be concerned about, or remedies to the problem would be greatly appreciated...