Download “ad-aware” and run that to start, might find something. If that doesn’t work, google AVG anti-virus and download and run that, see if anything comes up. Other than that, you can post a screenshot of your running processes. I don’t know how they show up in vista, but you can probably ctrl+alt+delete and go to a processes area, then Prt Scrn that.
Edit: Yeah, the site has been a little off/on the last bit. Kind of sucks, might want to check things out with the host. Its probably not a problem with the box, probably just part of the internets around it.