How do I fix this problem with grub after installing Ubuntu server?

How do I fix this problem with grub after installing Ubuntu server?

I've installed GRUB as part of the Installation process of Ubuntu Server
13.04 LTS edition. This is the screen that I get after booting from my
hard drive:
GRUB: Loading.
Welcome to GRUB!
error: file '/boot/grub/i386-pc/normal.mod' not found.
grub rescue>
I tried installing Ubuntu Server (after numerous installs) on my
partitioned hard drive. I remember them as sda5 and sda6. The install was
to dual boot with Windows 7. When I first install grub, I used the i386
iso, but after I found out that I could use the amd version to optimize, I
installed that.
Now, grub has an error and I don't know what to do.
Almost all the help tell me to use a CD-ROM, but I used a flash drive.
Now, I just want to either repair grub, or get rid of Ubuntu and grub
entirely, as long as I can save my Windows7 partitioned on my sda1-3.
I'm very new, so step by step instructions help.