Port 80 is the port of the website, including APACHE \ IIS \ NGING \ TOMcat, etc. I can only offer the following ideas.

1 Running' netstat -ano' found that port 80 was occupied by a process with pid=4.

2 Open the task manager and find that the process with pid=4 is actually a system process, and its corresponding process description is ntkernel &; System.

3 how to clear it? Need to use the registry, start -"regedit, open.

4 is located? HKEY _ LOCAL _ MACHINE \ SYSTEM \ current control set \ services \ HTTP？ Find the starting value in the window on the right.

5 Select Modify, change 3 to 4, and confirm.

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nine

9 restart the computer, ntkernel &; The system occupies port 80.