virtual machine XXX has terminated unexpectedly during startup

[Oighen]

"Failed to open a session for the virtual machine GriffonRC2.

The virtual machine 'GriffonRC2' has terminated unexpectedly during startup with exit code -1073741819 (0xc0000005). More details may be available in 'C:\Users\xxx\VirtualBox VMs\GriffonRC2\Logs\VBoxHardening.log'.

Result Code: E_FAIL (0x80004005)
Component: MachineWrap
Interface: IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}"

Machine: Windows10 with 32 GB RAM, 499 GB HDD. Actually, no matter what VM I am trying to load, the message is the same.

[socratis]

Last line of the log:

1d20.2dd4: supR3HardNtChildWaitFor[1]: Quitting: ExitCode=0xc0000005 (rcNtWait=0x0, rcNt1=0x0, rcNt2=0x103, rcNt3=0x103, 138 ms, CloseEvents);

Please read the following FAQ: Diagnosing VirtualBox Hardening Issues. There's nothing obvious from the log, so you'll have to search your system.