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Running it in the terminal, I get this:
WARNING: The vboxdrv kernel module is not loaded. Either there is no module available for the current kernel (4.4.0-47-generic) or it failed to load. Please recompile the kernel module and install it by sudo /sbin/vboxconfig You will not be able to start VMs until this problem is fixed.
I run that command but it did not complete successfully. I understand that there the kernel now enforces keys that each software should have in the kernel, but I do not know how to do that. Is there a step by step that I can follow so that Virtualbox(and also VMWare) works completely and fully(all functions run)? I do not want to disable SecureBoot.