VirtualBox OSE conflict with KVM

https://www.coolcoder.in/2011/08/virtualbox-ose-conflict-with-kvm.html
When starting virtual machine, VirtualBox will give error status:
"Failed to start the virtual machine XYZ
VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot.
(VERR_VMX_IN_VMX_ROOT_MODE).
(VERR_VMX_IN_VMX_ROOT_MODE).
There are different ways to solve this;
- In terminal type : modprobe -r kvm_intel
- Remove kvm and Qemu kvm through terminal
$ sudo apt-get purge kvm
$ sudo apt-get purge qemu-kvm
$ sudo apt-get purge qemu-kvm
The two mentioned above will either unload the kvm modules or remove them totally from your system.In case you don't want to remove kvm from your system and still use Virtualbox (though this would be hardly the case in my opinion)