Download Adaware and Spybot Search and Destroy, they're both free and very reputable. It's the only way you will get rid of them.
This is by far the best suggestion for you, in my opinion. Both are utilities that track down and remove spyware on you computer that was installed by some site you visited (you probably thought you were getting something for free)
Adaware is here
and Spybot Search and Destroy is here.