Right off the bat, I’m no network or security person. Know nada, so please be kind.
I’m running Windows 7, use Firefox, but it also happens in IE. If you need more info just let me know.
What happens is I’m surfing, click on a link and it takes me to a page that looks kinda like an ad/search page.
Then if I click on my back button it takes me to the page I was trying to visit the first time. It looks like this screen shot.