Adaware form click here and Microsoft's new programme click here are more than enough. The excellent click here is also a must-have and will clear all the crud. Best thing is that all of them are free.
I suggest you also download spywareblaster and spywareguard, both free downloads. They will help prevent many of the problems getting on to your computer. Since I installed them, Adaware and SpybotS&D both have far less items for removal than before, when I scan.