Here we will show you how to make a bootable DVD with ease. Let’s put the “Non-bootable” ISO file as an example. Firstly, Free Download WinISO, and then install it. Step 1: Install and run the software. After the installation, run the software. You can see the main interface as below. Step 2: Make bootable ISO file. Open an ISO file which is non-bootable ISO. Then set the boot image file.