What program in Windows 10 uses port 80? [closed]

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It’s probably the W3SVC (World Wide Web Publishing Service) service. See the answer below:

https://stackoverflow.com/a/31229606/1532882

  1. Click the start menu
  2. Type in Services
  3. Sort by Name
  4. Scroll down to World Wide Web Publishing Service (W3SVC) and disable it

Per phpvillian’s answer, you can also run the following to help determine the culprit (make sure you open the command line with elevated privileges, e.g. “Run as administrator”):

netstat -a -b

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