Hello, Mesh F90 and welcome to Seven Forums.
First you to boot to Ubuntu 12.04 and follow this :
1. Open your Terminal.
2. Type
grep menuentry /boot/grub/grub.cfg 3. You will got something like :
menuentry "Windows 7 (loader) (on /dev/sda1)" {
You will got other lines but you need this, this is last one.
4. Remember this quotes for Windows 7 (ex . "Windows 7 (loader) (on /dev/sda1)") (DON'T FORGOT quotes!!!) you will need it later.
5. In Terminal type this :
sudo nano -B /etc/default/grub 6. You will got this :
Code:
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX_DEFAULT="delayacct"
GRUB_CMDLINE_LINUX=""
.... you will have more ....
7. Change GRUB_DEFAULT to value for Windows 7 from menuentry (you remembered it

) (ex. GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)") (DON'T FORGET quotes).
8. Press CTRL+X and type "y" (without quotes) to save it.
9. Important step! Type in your terminal :
sudo update-grub
to save your changes
That is all and Windows 7 will be default now.
Trinty