回複：Of course Windows is buggy! No virus for Linux.

I remember one driving condition that the brake can become ineffective. Once I drove a car back from the mountain. I have to repeatedly apply the brake to slow down the car. Eventually I felt the brake is almost frictionless. I was nervous. Luckily the car has reached the foothill.

In this instance, the car was accelerating because of downhill. Although I did not keep the brake depressed it still became ineffective. We know it is the heat that generated that makes the brake losing friction.