WTF?

Hey, I downloaded a Halo PC torrent. When I downloaded it and hit either the "setup, or .exe" it said "missing so and so .dll files" so I downloaded them and put them in. THEN when I clicked it, it gave me: "The procedure entry point ogg_stream_reset_serialno could not be located in the dynamic link library ogg.dll."

What does this mean - what should I do to "fix" this?

Thanks.


(ps. Windows XP user, and no I'm not a torrent noob.)