Removing Grub from MBR


I have a dual boot system with a single hard disk divided into three partitions.
C:\ windows xp
D:\ windows vista
E:\ data

initially I had Ubuntu in partition D:, later I reformatted this partition and installed Windows Vista.

At boot up I get the following on screen message.

Booting GRLDR
Resetting the boot drive ... Success
Turning on gate A20... Success
etc... etc... etc...

then the windows vista boot menu is displayed with the xp and vista options.

How can I remove the Grub portion from the MBR using EasyBCD.

Thank you for your help in advance.