bios problem vista wont start

  sype 22:00 22 Nov 2007

after trying out ubuntu linux out on an external hard drive i have managed to stop vista working.
when the bios boots it gets to the GRUB loader which linux installed and then stops with the error 21 message.
How do i restore my bios to load vista?

  Fruit Bat /\0/\ 22:14 22 Nov 2007
  SANTOS7 22:14 22 Nov 2007

You might try entering bios setup & make sure the hard drive controller is set to "auto" and other hard drive controllers not being used are set to "off". might work..

  sype 13:22 23 Nov 2007

cant get any of those ways to work, anyone else got any ideas.

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