@Mayank Shekhar VT-x is a hardware feature in most modern CPUs. It is can be enabled/disabled in the BIOS of your computer. If you do not have the feature, then Virtualization won't work (VMWare or VirtualBox). You can read more here at this link: http://www.howtogeek.com/213795/how-to-enable-intel-vt-x-in-your-computers-bios-or-uefi-firmware/. I can't give you specific instructions on how to enable this feature, as it is different for every make and model of computer. You can also read more here: http://www.itworld.com/article/2981515/virtualization/virtualbox-diagnose-and-fix-vt-xamd-v-hardware-acceleration-errors.html ... View more