Hi @burakbilgehan,
As the issue you described is affectively also your internet connection (which EyeX software does not interact with) then I am inclined to think that the issue is not necessarily related to the Tobii software.
Is your network adapter actually showing up in the device manager? Presumably both Cable and wifi are not working?
I would concentrate on the issue of lost internet connectivity as there stands a great chance someone online has experienced a similar problem. Are you certain that it is the introduction of EyeX Software that begins this cycle of issues?
I wonder if maybe some background Windows update is occuring? A review of the Event Manager might present some clues…