That's KILLDISK or DBAN. Both are free and easily found with google if you add DOWNLOAD as a search term.
They fill every byte of the hard disk with zeroes.
PS. Are you sure it's a virus?
I am going to erase my hardrive to nothing, is there any recommedations on a program guaranteed to work that someone has used and can tell me that they know it works. I have a virus that will not come out .