Enable Intel VT on a HP laptop

Intel VT technology is especially useful if you want to use virtualization technology such as Xen or KVM.
I personnally had the following problem after trying to insert the kvm-intel module on my Ubuntu 8.04 :

sudo modprobe kvm-intel
FATAL: Error inserting kvm_intel (/lib/modules/2.6.20-6-generic/kernel/drivers/kvm/kvm-intel.ko): Operation not permitted

In order to fully use your Intel processor on a HP laptop, follow the following steps :

- boot your computer
- when the BIOS window shows up, enter the BIOS manager
- enable the Virtualization technology in the BIOS menu
- save the changes and exit
- shut down your computer
- remove the battery and put it back in your PC
- boot your computer

and Intel VT should work without problem.