vt-x is not available (verr_vmx_no_vmx) consolewrap?
Make sure Virtualization is enabled in your BIOS and that nothing uses it already - Hyper-V is a very common issue. and then restart the PC and try again to review the 64-bits VirtualBox environment. To sum this up : ... Solution is to enter BIOS settings at boot time and re-enable Virtualization (can be VT-x, VT-d, etc.).