Delete Ubuntu Safely with Win 7

(1) Download mbrfix.zip and unzip under root c:\
http://www.sysint.no/mbrfix

(2) Open Windows terminal and input:
cd \

mbrfix /drive 0 fixmbr /yes
(3) reboot
We don't see the grub list any more.

(4) delete the ubuntu partitions.

ref:
http://forum.ubuntu.org.cn/viewtopic.php?t=66401