http://jingyan.baidu.com/article/f96699bbca15a1894e3c1bc4.html
When a computer installs vs and then installs xampp, a port 80 conflict may occur, resulting in the inability of both at the same time. This article describes how to switch between the two.
method/step
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1 Run 'netstat -ano' and find that port 80 is occupied by the process with pid=4
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2 Open the task manager and find that the process with pid=4 is actually a system process, and its corresponding process description is NT kernel & system.
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3 How to clear it? Need to use the registry, start - "regedit, open
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4 Find the HKEY_LOCAL_MACHINE directory
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5 Find System
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6 Find CurrentControlSet-Services
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7 Find http-start again
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8 Open, change 3 to 4, OK
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9 Restart the computer, and the NT Kernel & System will take up port 80. If you want to use vs to run normally, change 4 to 3 in turn.
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