RESTORE TO DEFAULT FACTORY SETTINGS

When I hit the F8 Key I get the advanced boot up menu but it doesn't have the option to repair or do the factory reset, just options to boot in various safe modes, diagnostic or debugging modes.

I still have the full D partition with the full image, but I can't get to the menu that will let me use it. I do not have the disk that came with the laptop.

Thanks

Dell XPS Studio 1640

Windows Vista