Kubuntu - problems.

[lolwtfbbq]

When I tried to install Kubuntu on my desktop, the CD turned out to be defective - but it already installed GRUB; I was thinking of creating a dualboot with Vista. I booted up the machine, it displays 'GRUB' after I had overwritten the mbr. Have you got some ideas to allow me to get rid of GRUB, and let me boot normally.

 

[lolwtfbbq]

Sorry if i was being vague, I can not boot into any os. Vista has already been installed, and I am using a ubuntu live cd to type this. the /fixboot command strangely does not work.