Door Latch problems of the 1999 Nissan Maxima

Several times, as I have been driving down the road, the power locks (on every door) in my car suddenly unlock. At other times, only the front two doors unlock. Immediately before this occurs, I can hear the power controls on each door make an electrical noise as if an electrical malfunction is occurring. All four of my power windows also intermittently malfunction and refuse to roll down (while at other times they work perfectly). The lock defect creates a dangerous situation as my children who are riding in the can then exit the car.