tks for your quick answer
you must be talking about this manual :
I can see this explanation in it :
11.4.1 Linux kernel module refuses to load
If the VirtualBox kernel module (vboxdrv) refuses to load, i.e. you get an “Error inserting
vboxdrv: Invalid argument”, check (as root) the output of the dmesg command
to find out why the load failed. The most common reasons are:
• With Linux 2.6.19 and higher, the NMI watchdog may be active. Add
nmi_watchdog=0 to the kernel command line (e.g. in your grub configuration)
and reboot. With the Debian and Ubuntu installation modules, execute
sudo dpkg-reconfigure virtualbox again.
• The kernel disagrees about the version of the gcc used to compile the module.
Make sure that you use the same compiler as used to build the kernel.
But anyway, I am not sure to understand what I need to do