How to use GRUB as default bootloader while dual booting Win7+ubuntu

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http://askubuntu.com – I installed windows 7 first and then Ubuntu, booted back into windows and used EasyBCD to use the Windows 7 bootloader for dual booting. So when the system is rebooted Windows bootloader comes up first and once you select Ubuntu then GRUB shows up. I need to how to make GRUB the default bootloader instead of windows 7's. Thank you (HowTos)