Sometimes you can get “VT-x is not available. (VERR_VMX_NO_VMX)” error if you are trying to start x64 bit virtual machine in VirtualBox.

Failed to open a session for the virtual machine Windows 10 TP.
VT-x is not available. (VERR_VMX_NO_VMX).
Result Code: E_FAIL (0x80004005)
Component: Console
Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}
 
 
There are three most common reasons for this error:

Your CPU doesn’t support VT-x Read More →