VirtualBox - How to solve "VT-x not available" when VT-x is turned on in BIOS?

I have a VirtualBox that was working before I installed Docker for windows.

Now when I try to open a VM (64bit) that was working I get the follow error:

VT-x is not available (VERR_VMX_NO_VMX).


Result Code: 
E_FAIL (0x80004005)
Component: 
ConsoleWrap
Interface: 
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

Now when I try to create a new VM I can only do it for 32bit, not 64bit any more. And if I try to create a 32bit I get a blue screen from windows.

Inside the bios I have Virtualization and VT-x enabled.

My OS is Windows 10, 64bit

How to solve this issue?

Ok I found a solution. Just turn off hyper-v and virtualBox will works.

In the other hand Docker for windows displays the follow error: