Following steps are what I did for my Dual Boot system Asus GT703G Laptop
Based on various blogs particularly this.vip link to follow
- Downloaded Ubuntu i386 iso(for 32 bit) or amd64(for 64 bit) from here. Need to use amd64 Ubuntu iso file rather than i386 iso. It works for Intel machine(verified by ask-ubuntu).
- Created bootable USB using this
- Made the partition of 300 GB in my D drive to install Ubuntu1
- Disabled "fast boot" option Shift+Restart-> Troubleshoot-> Advanced Setting->UIFE Firmware setting->Restart->Advanced mode->boot
- Disable Secure Boot option Shift+Restart-> Troubleshoot-> Advanced Setting->UIFE Firmware setting->Restart->Advanced mode->find somewhere here
- Boot menu has 2 boot options. I have set higher priority to USB booting. As shown in the above screenshot.
- Enabled USB Legacy Support Shift+Restart-> Troubleshoot-> Advanced Setting->UIFE Firmware setting->Restart->Advanced mode->find somewhere here
- Save and Restart
For screenshots Please refer following questions: Stachoverflow4 superuser5