2 replaced http://askubuntu.com/ with https://askubuntu.com/
source | link

Hav u disabled secure boot from windows 8?

While booting ubuntu from live usb, try doing a sudo os-prober to list installed operating systems. If it shows windows 8, you are safe, else there is problem in UEFI bios, follow http://askubuntu.com/questions/435160/cant-boot-windows-7-after-installing-ubuntu/435364#435364https://askubuntu.com/questions/435160/cant-boot-windows-7-after-installing-ubuntu/435364#435364

Install the bootloader in /dev/sda and ubuntu in /dev/sda5.

Hav u disabled secure boot from windows 8?

While booting ubuntu from live usb, try doing a sudo os-prober to list installed operating systems. If it shows windows 8, you are safe, else there is problem in UEFI bios, follow http://askubuntu.com/questions/435160/cant-boot-windows-7-after-installing-ubuntu/435364#435364

Install the bootloader in /dev/sda and ubuntu in /dev/sda5.

Hav u disabled secure boot from windows 8?

While booting ubuntu from live usb, try doing a sudo os-prober to list installed operating systems. If it shows windows 8, you are safe, else there is problem in UEFI bios, follow https://askubuntu.com/questions/435160/cant-boot-windows-7-after-installing-ubuntu/435364#435364

Install the bootloader in /dev/sda and ubuntu in /dev/sda5.

1
source | link

Hav u disabled secure boot from windows 8?

While booting ubuntu from live usb, try doing a sudo os-prober to list installed operating systems. If it shows windows 8, you are safe, else there is problem in UEFI bios, follow http://askubuntu.com/questions/435160/cant-boot-windows-7-after-installing-ubuntu/435364#435364

Install the bootloader in /dev/sda and ubuntu in /dev/sda5.