Anyone had this come up??

hackit.toolkit, cant seem to get rid of it.
It has changed my home page to some advert for spyware, saying i am infected with it, download now to remove.

the url to this page is www.yoursystemupdate.com

also avg come up with one named java/byteverify, but wont delete it

Norton wont delete them either

any idea as to how to get rid?
Have tried turning system restore of and booting in safe mode and running a full system scan with norten but still no go

fooking things