Brand new laptop...with a problem

[The DJ 27]

Had my new laptop delivered today. Just come on the internet now, and instantly got one of those ads that look like a dialog box. I've now been on the net for 25 minutes, and have sent 8,302 bytes of data, but only recived 4,473 bytes. I've also had about 40 pop ups. It shouldn't have any spyware or adware on it yet, but it seems to be crawling with it. I haven't downloaded anything yet! Attempted to get MSN Messenger, but gave up as I was only gettin 900 bytes/sec trasfer rate. The computer is CONSTANTLY sending and recieving data, even when I'm not loading a page. Any explanation? It's an Acer TravelMate 240 if it helps

[The DJ 27]

Can anyon recommend a decent, free spyware and adware remover I can download, because this is ridiculous. I'm sending more data onto the net than I'm recieving. Never had this problem on my old laptop, and that was totally unprotected