Hi,
First of all, please try to describe the problem more precisely.
For example, what do you mean by "This followed later by notice that 4.16 had reached update 18" ?
What 18? Do you mean 4.18 perhaps?
And what do you mean by "Say to reload the dkms and the modprobe"?
If Linux Lite gives you a message related to a problem, then please copy the actual message here,
so that it is possible to find out what the actual problem is...
Thanks!