Its not spyware, and its not your forums.
The 503 Error means your server is probably getting over loaded, or it could also be a variety of other issues as well with your server.
Then after that, My guest is that, you've got your default search engine in your browser set to "searchportal.information.com" either you could have set this, or some software you've downloaded (knowingly or unknowingly) has modified your default search page.
If you click the link below, do you get taken to the searchportal.information.com:
http://rh8234i90tj490thisisntarealsite.com
If so, you'll need to adjust the settings in your browser, if not.
Well if not then i dont have a clue.