Struck at grub rescue after accidently deleting the ubuntu partion

If you have installed ubuntu 10.10 or any linux operating system on a extendended partition and have accidently deleted it.trying to free up space

Then you  willl be struck at grub screen.

The simplest way for you to boot  into windows again  is to use a live ubuntu live cd

and execute the following commands in the terminal

sudo apt-get install lilo
sudo lilo -M /dev/sda mbr