For the past few months we have encountered excessive data usage problems that can't be happening. We have 2 laptops, my wife's and my own. All auto updates are turned off. The router and access point for the printer are password enabled with mac address entry enabled. This is a very secure system. We don't download videos or music, usage is just casual. I updated to the 25/12 plan from the 15/12 plan with the same excessive use results in one month. Very frustrating!!!