OK, I know there isn't a legitimate reason to remove Ubuntu from a Vista dual boot, but I was low on hard disk space and I really needed it.
Read the guide here
So, here's what I did. I deleted the Ubuntu partition from the Vista Disk Managment Console and when I restarted the PC, the Windows wouldn't start because of a Grub Loader Error 17. Whatever…. If someone does this, here's how to fix it.