GARoss,
Assuming you can boot Ubuntu, open a terminal (Applications, Accessories, Terminal) and run these commands:
Code:
grep menuentry /boot/grub/grub.cfg
gksu gedit /etc/default/grub
The first command will display the "menuentries" in your Grub2 menu. Count the menuentries starting from 0 and determine the Vista entry (e.g. if it's the third menuentry, the number would be 2).
Next edit /etc/default/grub and find the "DEFAULT=0" line and replace it with the new number. Save the file, then run:
Reboot.
If you need clarification it's explained in the "Tasks" link in my signature line.
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