cmd kill process on port 80 in windows

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C:\Users\john>netstat -ano | findstr LISTENING | findstr :80
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       6880
  TCP    [::]:80                [::]:0                 LISTENING       6880

C:\Users\john>taskkill /PID 6880
ERROR: The process with PID 6880 could not be terminated.
Reason: This process can only be terminated forcefully (with /F option).

C:\Users\john>taskkill /F /PID 6880
SUCCESS: The process with PID 6880 has been terminated.

C:\Users\john>

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C:\Users\john>netstat -ano | findstr LISTENING | findstr :80
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       6880
  TCP    [::]:80                [::]:0                 LISTENING       6880

C:\Users\john>taskkill /PID 6880
SUCCESS: The process with PID 6880 has been terminated.

C:\Users\john>

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C:\Users\john>netstat -ano | findstr LISTENING | findstr :80
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       6880
  TCP    [::]:80                [::]:0                 LISTENING       6880

C:\Users\john>taskkill /F /PID 6880
SUCCESS: The process with PID 6880 has been terminated.

C:\Users\john>

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# 1. open cmd (windows key + r; type: cmd; press enter key)
# 2. type:
   netstat -ano | findstr LISTENING | findstr :80                         PIDs
                                                                           |
   # Example output:                                                         v
   #  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       6880
   #  TCP    [::]:80                [::]:0                 LISTENING       6880
     
# 3. type:
   taskkill /F /PID 6880