Install Ubuntu Alongside Windows 10. But it turned out that most of the process didn't worked for my PC. Once you have disabled secure boot, it's time to install Ubuntu.
If your computer has no other Operating System already installed and you plan to use a Windows variant alongside Ubuntu, you should first install. Otherwise, select the "something else" option in case you need to. Do you use a pen drive for your Ubuntu?
Tutorial to install Ubuntu along with Windows in your system to get maximum advantages of both operating systems.
Select this selection, if you don't necessarily mind about the auto partitioning of the hard drive.
Ubuntu is a popular operating system which is open source and has easy installation. If your computer has no other Operating System already installed and you plan to use a Windows variant alongside Ubuntu, you should first install. The manuals I found in the internet were not clear enough and I did not want to take "risks".