I have done this before in my Dell machine.There was an option to install ubuntu inside c drive in win 8.1(It consumes 18 GB of drive space of windows c drive.No need to create different partion to install Ubuntu)
When I tried the same installation method in my friend's HP laptop there was no option like install Ubuntu inside windows.Please tell me how to install Ubuntu inside windows 8.1 (in HP Pavalion)
Thank You.