virtualbox.org

This is my line: from msinfo:
Processor Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz, 2701 Mhz, 2 Core(s), 4 Logical Processor(s)

Following the guide, I managed to remove credential guard, device guard and the secure boot. The problem persists, but now instead of a BSOD on my 64 bit machines I get this one: VT-x/AMD-V hardware acceleration is not available on your system. Your 64-bit guest will fail to detect a 64-bit CPU and ...

I think this is the problem..

Virtualization applications do not work together with Hyper-V, Device Guard, and Credential Guard
reference:
support.microsoft.com/en-in/kb/3204980

The linked tutorial also mentions other things besides Hyper-V and BIOS that could take over VT-x and prevent Virtualbox from using it. Thanks for your idea! Looking in msinfo32 I found that there is something called Device Guard running and it seems to be a Win 10 feature related to virtualization...

Unfortunately I rebooted and halted my pc many times but the problem persists.

Dear all, first of all thanks for your time and help. My issue is the following: I have different 64 bit linux virtual machines and I launch them from Windows using VirtualBox-5.1.8-111374-Win. Everything was working fine until I made an update of windows 10. After that I'm not longer able to open a...