can't fully remove kubuntu

This is what I did using XP;

Insert your Vista disk in the CD reader.
Start your system
Boot from the CD
Select r for repair
Select choice 1,
you should now have a c:\prompt
if so enter help,
a list of actions is now shown
select fixmbr or something similar for Vista,
If not sure enter help fixmbr, this will tell what the command does.

Entering fixmbr will rewrite the Windows boot record.

remove CD and boot Windows.

Hope this helps

groeten EA

Yup, that looks about right. Have you noticed what happens when you select one of the Kubuntu options after you've uninstalled it? In Xp whichever option you choose from the boot-menu you always get to a normal boot of Xp! Hopefully this link might help but i think you'll probably already have fixed it using Ealthuis' advice, assuming you've got a Windows disc - oh, isn't that one of the problem with Windows, getting a disc is tough? I think a pirate copy might do the job but who wants to use pirated versions when you don't know who's been messing with the files in them, or why?
https://wiki.ubuntu.com/WubiGuide#Uninstallation

Installing Ubuntu in Windows means that Ubuntu has to rely on various Windows systems working and as such it combines the worst of the 2 OS's - it's a bit like building a house on shifting sands. A much better way of experiencing Ubuntu is straight from the Cd itself, even though it'd be slow at least it would be stable. There is a good way to combine the strengths of the 2 OS's
https://help.ubuntu.com/community/BootFromCD
https://help.ubuntu.com/community/WindowsDualBoot
it is a little more work to set up but does work so much better that it's hard to believe it's the same OS. This makes a really strong system with each OS adding to the strengths of the other. Altogether much more robust, secure, flexible and fun too.

Good luck and regards from
Tom :)

lol, it's not really "grub" it's the Windows equivalent but there is a grub-boot-loader that you could use to replace the somewhat flaky Windows boot-loader. It's easiest for our filing system to put this in the grub folder though because we don't list Windows packages ;)