If your install of Linux is a dual boot setup with windows you have run into this problem before. You reinstall windows and suddenly you can no longer access your Linux partition or the Grub bootloader. You can always go through the entire install of Ubuntu again, or you can try to repair the bootload, but how do you repair the bootloader? Here we look for the way to restore grub after windows install. Well…"Restoring Ubuntu (or any distro) Grub Bootloader After Windows Install"