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>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]

Answer 1

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.