Create a file called /etc/modprobe.d/blacklist-kvm.conf
:
(For example, you can use gedit gksu gedit /etc/modprobe.d/blacklist-kvm.conf
or nano sudo nano /etc/modprobe.d/blacklist-kvm.conf
)
Put in it the following three lines:
blacklist kvm blacklist kvm_intel blacklist kvm_amd