XAMPP Port 80 in use by Unable to open process with PID 4

Question

XAMPP won t work it says   Port 80 in use by  Unable to open process  with PID 4  6 32 24 PM   Apache     Apache WILL NOT start without the configured ports free  6 32 24 PM   Apache     You need to uninstall disable reconfigure the blocking application 6 32 24 PM   Apache     or reconfigure Apache and the Control Panel to listen on a different port   I have tried everything from deleting the World Wide Web Publishing Service  which did not work because i dont even have it installed   To using the command prompt which says  Active Connections    Proto  Local Address          Foreign Address        State           PID   TCP    0 0 0 0 80             Dave 0                 LISTENING       4   TCP    0 0 0 0 135            Dave 0                 LISTENING       776   TCP    0 0 0 0 445            Dave 0                 LISTENING       4   TCP    0 0 0 0 2382           Dave 0                 LISTENING       2576   TCP    0 0 0 0 5357           Dave 0                 LISTENING       4   TCP    0 0 0 0 49152          Dave 0                 LISTENING       548   TCP    0 0 0 0 49153          Dave 0                 LISTENING       928   TCP    0 0 0 0 49154          Dave 0                 LISTENING       972   TCP    0 0 0 0 49155          Dave 0                 LISTENING       1264   TCP    0 0 0 0 49156          Dave 0                 LISTENING       660   TCP    0 0 0 0 49157          Dave 0                 LISTENING       1832   TCP    0 0 0 0 49159          Dave 0                 LISTENING       652   TCP    0 0 0 0 51782          Dave 0                 LISTENING       1884   TCP    127 0 0 1 51783        Dave 0                 LISTENING       1884   TCP    192 168 0 16 139       Dave 0                 LISTENING       4   TCP    192 168 0 16 50260     stackoverflow https    ESTABLISHED     5768   TCP    192 168 0 16 50263     ec2-54-237-50-81 https  ESTABLISHED     5768   TCP    192 168 0 16 50287     bn1wns1011221 https    ESTABLISHED     1640   TCP    192 168 0 16 50456     bn1wns2011310 https    ESTABLISHED     1640   TCP    192 168 0 16 50489     stackoverflow http     ESTABLISHED     5768   I dont understand why its not working because it was working fine a couple days ago could someone help please  thanks When i do netstat -a -b it says this   Microsoft Windows  Version 6 3 9600   c  2013 Microsoft Corporation  All rights reserved   C  WINDOWS system32 gt netstat -a -b  Active Connections    Proto  Local Address          Foreign Address        State   TCP    0 0 0 0 80             Dave 0                 LISTENING  Can not obtain ownership information   TCP    0 0 0 0 82             Dave 0                 LISTENING   httpd exe    TCP    0 0 0 0 135            Dave 0                 LISTENING   RpcSs   svchost exe    TCP    0 0 0 0 443            Dave 0                 LISTENING   httpd exe    TCP    0 0 0 0 445            Dave 0                 LISTENING  Can not obtain ownership information   TCP    0 0 0 0 2382           Dave 0                 LISTENING   sqlbrowser exe    TCP    0 0 0 0 3306           Dave 0                 LISTENING   mysqld exe    TCP    0 0 0 0 3306           Dave 0                 LISTENING   mysqld exe    TCP    0 0 0 0 5357           Dave 0                 LISTENING  Can not obtain ownership information   TCP    0 0 0 0 49152          Dave 0                 LISTENING   wininit exe    TCP    0 0 0 0 49153          Dave 0                 LISTENING   EventLog   svchost exe    TCP    0 0 0 0 49154          Dave 0                 LISTENING   Schedule   svchost exe    TCP    0 0 0 0 49155          Dave 0                 LISTENING   spoolsv exe    TCP    0 0 0 0 49156          Dave 0                 LISTENING   lsass exe    TCP    0 0 0 0 49157          Dave 0                 LISTENING   msmdsrv exe    TCP    0 0 0 0 49159          Dave 0                 LISTENING  Can not obtain ownership information   TCP    0 0 0 0 51782          Dave 0                 LISTENING   sqlservr exe    TCP    127 0 0 1 51783        Dave 0                 LISTENING   sqlservr exe    TCP    192 168 0 16 139       Dave 0                 LISTENING  Can not obtain ownership information   TCP    192 168 0 16 49180     bn1wns2011302 https    ESTABLISHED   Explorer EXE    TCP    192 168 0 16 49267     ec2-54-80-62-105 https  ESTABLISHED   opera exe    TCP    192 168 0 16 49318     bn1wns2011304 https    ESTABLISHED   Explorer EXE    TCP    192 168 0 16 49397     ord08s08-in-f14 http   ESTABLISHED   opera exe    TCP    192 168 0 16 49417     ord08s08-in-f14 http   ESTABLISHED   opera exe    TCP    192 168 0 16 49418     ord08s09-in-f5 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49427     static-acs-24-101-16-41 http  TIME WAIT   TCP    192 168 0 16 49428     static-acs-24-101-16-24 http  TIME WAIT   TCP    192 168 0 16 49429     static-acs-24-101-16-41 http  TIME WAIT   TCP    192 168 0 16 49430     static-acs-24-101-16-41 http  TIME WAIT   TCP    192 168 0 16 49431     static-acs-24-101-16-41 http  TIME WAIT   TCP    192 168 0 16 49432     ord08s08-in-f2 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49434     ord08s08-in-f5 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49435     ord08s08-in-f5 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49436     ord08s08-in-f5 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49437     ord08s08-in-f5 http    ESTABLISHED   opera exe    TCP    192 168 0 16 49438     ord08s08-in-f5 http    ESTABLISHED   opera exe

User · Answer

Your port 80 is being used by the system.

In Windows “World Wide Publishing" Service is using this port and it's process is system which PID is 4 maximum time and stopping this service(“World Wide Publishing") will free the port 80 and you can connect Apache using this port. To stop the service go to the “Task manager –> Services tab”, right click the “World Wide Publishing Service” and stop.
If you don't find there then Then go to "Run > services.msc" and again find there and right click the “World Wide Publishing Service” and stop.
If you didn't find “World Wide Publishing Service” there then go to "Run>>resmon.exe>> Network Tab>>Listening Ports" and see which process is using port 80

enter image description here

And from "Overview>>CPU" just Right click on that process and click "End Process Tree". If that process is system that might be a critical issue.

User · Answer

Simply set Apache to listen on a different port  This can be done by clicking on the  Config  button on the same line as the  Apache  module  select the  httpd conf  file in the dropdown  then change the  Listen 80  line to  Listen 8080   Save the file and close it   Now it avoids Port 80 and uses Port 8080 instead without issue  The only additional thing you need to do is make sure to put localhost 8080 in the browser so the browser knows to look on Port 8080  Otherwise it defaults to Port 80 and won t find your local site

User · Answer

I had the following error message Port 80 in use by  quot Unable to open process quot  with PID 4  Apache WILL NOT start without the configured ports free  You need to uninstall disable reconfigure the blocking application or reconfigure Apache and the Control Panel to listen on a different port Starting Check-Timer Control Panel Ready opened the httpd conf and changed the listen port from 80 to 1234 in both places Listen 12 34 56 78 1234 Listen 1234 Then go to Config for the xampp control panel and go to service and port setting and changed the port from 80 to 1234 That worked

User · Answer

So I have faced the same problem when trying to start apache service and I would like to share my solutions with you  Here is some notes about services or programs that may use port 80    Skype  skype uses port 80 443 by default  You can change this from tools- options-  advanced- connections and disable checkbox  use port 80 and 443 for addtional incoming      connections   IIS  IIS uses port 80 be default so you need to shut down it  You can use the following two commands   net stop w3svc   net stop iisadmin SQL Server Reporting Service  You need to stop this service because it may take port 80 if IIS is not running  Go to local services and stop it    These options work great with me and I can start apache service without errors   The other option is to change apache listen port from httpd conf and set another port number   Hope this solution helps anyone who face the same problem again

[php] XAMPP Port 80 in use by "Unable to open process" with PID 4

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