Unable to start Virtual Machine (exit code 0x01)

[MC77]

Dear Virtual Box support,

i have a critical problem on my Windows 10 machine (64bit), without any previous advice all the Virtual Machines installed are unable to start. I started and used VM succesfully one day and after restarting my toshiba notebook PC i had this problem.

Here is the error reported when starting a Virtual Machine:

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Apertura di una sessione per la Macchina Virtuale Win 7 (64-bit) non riuscita.

The virtual machine 'Win 7 (64-bit)' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in 'C:\Virtual Box VM\Win 7 (64-bit)\Logs\VBoxHardening.log'.

Codice 'uscita: E_FAIL (0x80004005) Componente: MachineWrap Interfaccia: IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}

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The log of the startup are attached to this message .

Please give me some feedback about this issue.

I used VB for many years and this is first time i encouter souch a big problem.

Best regards, Massimo Cavagni

[MC77]

Logs created when starting VM. Please check "VBoxHardening.log"

[frank]

Could you rested with 5.1.24 and attach the latest VBoxHardening.log file if it still does not work?

[dedwards]

Hello

I am running windows 10 enterprise and have installed the Virtualbox and the extension pack.

Problem I am having is that I do not have the option to select the 64 bit client when creating a new machine.

Is this a problem with windows 10 enterprise and Virtual box version 5.1.24r117012

Thanks

[socratis]

@dedwards
You do NOT have the same problem, please do not hijack other people's threads. For your problem please go thoroughly through the FAQ:  I have a 64bit host, but can't install 64bit guests.

And please do not continue the discussion in this ticket, please head to the forums. So, if you can, please open a new thread in the  VirtualBox on Windows Hosts section of the forums.