I first installed Ubuntu 14.04 from live USB and after confirming that it s working properly i installed windows 8.1 from CD.
Now i am unable to boot Ubuntu. Although Windows is working fine.
I installed Ubuntu 14.04 on my HP laptop which has Windows 8 installed by manufacturer. I disabled SecureBoot from BIOS and then made a bootable USB for Ubuntu.
First installation of Ubuntu didnt work for me as it kept on rebooting to Windows.