virtualbox.org

I am unable to create a new virtual machine and I can't use any older machines.
I use as host Windows 7 Pro 64 bits updated today.
I can´t create any kind of guest (WinXP, Win7, Linux...)
When I try to start it (before installing the operating system) I always get :
>-------------------------------------------------------------
Fallo al abrir una sesión para la máquina virtual 45645.

The virtual machine '45645' has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005). More details may be available in 'd:\Users\usuar\VirtualBox VMs\45645\Logs\VBoxHardening.log'.

Código Resultado: E_FAIL (0x80004005)
Componente: MachineWrap
Interfaz: IMachine {f30138d4-e5ea-4b3a-8858-a059de4c93fd}
>-------------------------------------------------------------

If I try to open any other older virtual machine of mine, I get the same error.

I have Symantec EndPoint Protection version 12.1.1000.157 RU1
VirtualBox 5.0.14 r105127

I have tried reinstalling. Unstalling and installing. With 4 diferents versión or VirtualBox.

In the same computer I have 2 windows installed, one "serious" (for work) and other to play games. The same windows version, and the same Symantec Antivir. But in the second one I have no problem.

Nobody can help me?

If you have the exact same antivirus version on both computers, then maybe there is another source for your problem, typically a theme-modifying program, a debugger, or an update from Microsoft that caused the signatures of key DLLs to get invalidated. Some of them are, KB3004394, KB3045999, and KB3081320, but not all of them. Look at the Discussion of Problems due to Hardened Security for more information.