My Google has been hijacked?

When I use google on any browser, it only shows results using an Adsense thing. It looks like this whenever I search [IMG]http://i711.photobucket.com/albums/ww114/welher/untitled.jpg[/IMG] Its really annoying me because it looks worse and doesn't have as many search results as before. I seem to... show more When I use google on any browser, it only shows results using an Adsense thing.

It looks like this whenever I search

[IMG]http://i711.photobucket.com/album...

Its really annoying me because it looks worse and doesn't have as many search results as before.

I seem to remember installing a program and when i was clicking through next, next etc i think it might have said something like "use ... as default search provider"

How can I remove the adsense?
Update: http://i711.photobucket.com/albums/ww114...

Sorry first link didn't work
3 answers