I don't have any of the Windows disks. This was a Graigs List machine.
Came with a desk but no software. :)

The problem is that Lubuntu never did install. There's no Grub that I know of.
The machine just boots to windows. When I use the Live CD I can see that there
are two partitions, one for Windows and the other ready for the Lubuntu OS. IF
Lubuntu had installed I would just keep and use it. Since it didn't, I just want
to get back that 40 gigs or so that are sitting there not acessable by Windows.

I have some time today and will try the gparted suggestions below. My concern is
that it might screw up Windows but it's worth a shot. If all else fails, I'll
end up with another Linux box and continue my search for a cheap Windows
machine. :)