Most modern CPUs contain a hardware-assisted virtualization feature to help accelerate Type-1 and Type-2 hypervisors. Before importing the OVA, ensure that your system's virtualization extensions are turned on in the BIOS or UEFI. Access your BIOS or UEFI firmware by entering the setup screen. Once inside, look for any of the following options and make sure they are turned on: Intel Virtualization Technology, Intel VT-X, AMD-V, Virtual Extensions, and so on. Save your settings and reboot the system.