One or two sites I visit regularly, have today, been redirected to the Dell search page with the message

Sorry, we couldn't find http://altfarm.mediaplex.com/ad/fm/5...-11000-0%3Fmpt.

This has happened in the past but not as bad as today. The site I use a lot with normally no problem is http://www.advfn.com/

I run my normal spyware program but nothing is found and the problem has persisted all day. Any ideas?

Ken