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How I  Restored GRUB2 after a Windows 7 Install .  GRUB2  (Grand Unified Bootloader)  is a universal bootloader used by Ubuntu and other Linux Distributions. If you have a Linux Distribution installed on a partition, and attempt to  install Windows alongside it, your GRUB bootloader will be overwritten by the Windows bootloader, and your computer will only boot into Windows. Recovering the GRUB2 Bootloader  after a Windows Install  is simple. When finished, your Bootloader should detect all installed Operating Systems and automatically add a bootable menu item for each of them. Note : This GRUB2 Installation process assumes that a Linux Partition still exists. If you overwrote Linux with Windows, this tutorial will not work for you, as there is no Linux system to recover boot. How to Restore GRUB2 after installing Windows : Boot from an Ubuntu Live CD or Live USB Once up and running,  Open a Terminal   Type  sudo su  (press...