Yesterday updated the computer system under the morning to find yourself a site originally deployed on iis all been stopped. . . . . . . Then find a website which re-start, but it is unable to start, prompt as shown:
This is because the port 80 is occupied, you can see the command line input -ano netstst
PID find the corresponding port 80, and then to the computer's task manager == "service to find the corresponding PID, and the PID of the corresponding service to stop.