I am currently using Windows 8.1. Now I want to use Ubuntu 14.04 as the 2nd operating system in my Laptop. I have searched many and watched many tutorials of dual booting. But in most tutorial Ubuntu was the parent OS. But I want to make Windows 8.1 as my parent OS.Can anyone please help me with a complete tutorial that how can I do that. I exactly want my PC ask me to choose an OS on start screen under windows 8.1
(Disclaimer: I've only done this on Windows 7, however I understand it should work just as well on 8.1.)
Install EasyBcd on Windows.
Make sure you have a recovery or installation cd/usb for Windows 8. You'll need it. You can generate one from within Windows 8 itself if you don't have one. See http://windows.microsoft.com/en-us/windows-8/create-usb-recovery-drive for instructions. It might be a good idea to write down your Windows 8 key as well.
Install Ubuntu. Follow whatever guide you find for that. Just make sure you don't erase the Windows partition. At this point, you should be able to boot into Ubuntu only using grub, not Windows. You may have an option for Windows in grub, but that isn't what you want.
Boot into your recovery/installation cd/usb. Choose repair Windows and let it fix the startup problems. When this is done, you should be able to boot into Windows, but not anything else.
Boot into Windows. Start EasyBcd. Add an booting option, choose "linux". Save. You should now have dual boot from the Windows bootloader.