Another benefit is: also virtualbox is working. When I tried to start the application, I got the error

The vboxdrv kernel module is not loaded. Either there is no module available for the current kernel (4.4.19) or it failed to load.
Workaround at the time: Convert the image with VBoxManage ...

Great - thank you.

At first I did the Update of the kernel with
sudo slapt-get --update
sudo slapt-get --install kernel-huge kernel-modules kernel-headers kernel-firmware kernel-source
sudo lilo -v

After a reboot I checked the kernel with
$ uname -r
4.4.88

The update was correct :D

After ...

Thank you for the answer.
But it is not working :o

I am using the standard-Kernel 4.4.19, see:
uname -r
4.4.19

In /lib/modules/4.4.19 I can that the link is ok, see:
ls -all
insgesamt 3812
drwxr-xr-x 3 root root 4096 Nov 7 00:50 .
drwxr-xr-x 3 root root 4096 Nov 7 00:38 ..
lrwxrwxrwx 1 root ...

On my laptop the wireless card is not working. In the config I see, that the notebook is working with a BCM43142, see:
sudo lspci -vv | grep Network
02:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)

Buf ifconfig or iwoncig only shows eth0 and lo.
sudo ifconfig wlan0 ...