I've been attacked by sweet-page! How to uninstall completely?

So I don't know with what app it came with but it overtaken all my browsers home page to it's own and all. I went to properties of all the browsers and changed the target by deleting sweet-page related crap, but I still believe it's there somewhere on my HD lying silently. So may I ask how to remove this crap completely?
I don't have any Anti virus or Internet security installed, my Norton got expired last week and haven't installed any since then.