Experienced a problem with electrical theft deterrent system and it shut the vehicle off while driving. I tried to start the vehicle and nothing happened except it said theft deterrent system. I took the key out tried starting again and it turned over immediately. The dash said theft deterrent and I clicked dismiss but the dash icon (a car with a lock light) remained on. I then drove 11 miles home. I turned on my directional proceeded to brake upon approaching my driveway. As I attempted to turn the steering wheel the vehicle completely shut off. The info system stating theft deterrent active. I lost power steering and brakes. I needed to press the brakes with great force because the vehicle was headed towards the sidewalk and a road sign. Steering was virtually unresponsive. Vehicle stopped as the tires reached the curb and approximately 1 ft from the sign. Placed vehicle in park and started it back up. Pulled into my driveway and the info system stated I need to roll the drivers window down and the up to deactivate. I have checked all battery connections are intact and tight. The battery, starter and alternator were all checked and fine. I have no idea what caused this dangerous behavior. The incident happened on MA Rt. 126 988 S. Main st Bellingham MA 02019