I get a message from my system to update from 4.4.3 to ----> 4.4.4.
so I press install, and he started to install, after 25~ seconds, my nexus said: "error". (because of the root...)
because of this I decided to updated manually through: "toolkit" and the root will be gone.
I download the 4.4.4 from google's website: https://developers.google.com/android/nexus/images, and "toolkit" updated my nexus to 4.4.4 and the root gone.
now when I will get a message to update system I will be able to install normally?