We have observed that when attempting to run a VirtualBox image in Oracle VirtualBox, an error appears stating that VirtualBox is not signed with a build certificate ...

Some users are unable to see 64-bit guest operating systems displayed on the Oracle VM VirtualBox application and because of this, they are not able to install such operating systems on VirtualBox. In ...

In order to rule out that it's not an issue with that physical computer and in order for the thing to be reproducable, i thought of trying it in a Virtual Machine 'cos if anybody here could get it ...