Then I would not be surprised if it is related to the update. Have you tried turning off the laptop (off not sleep or hibernate) and only turning it back on where it can't access the internet at all?
Sometimes the updates get stuck/don't work correctly and then you get stuck in a loop of it retrying to download and install it over and over.
Starting up the laptop, without any access to internet, will often resolve this. It only needs to be done one time. Then after it should be ok to start it with access.