So I've just installed xampp 1.8.2 and had to modify some port settings to get Apache running. Port 80 changed to 8088 and 443 to 4499. When I try to test the server with http://127.0.0.1in Chrome I get the Error 503. I found a post saying it could be a problem with TomCat but I can't start it, please see below, and I don't know what to do next 
Any help greatly appreciated.18:10:36 [main] Initializing Control Panel
18:10:36 [main] Windows Version: Windows 7 Ultimate SP1 32-bit
18:10:36 [main] XAMPP Version: 1.8.2
18:10:36 [main] Control Panel Version: 3.2.1 [ Compiled: May 7th 2013 ]
18:10:36 [main] Running with Administrator rights - good!
18:10:36 [main] XAMPP Installation Directory: "c:\xampp\"
18:10:36 [main] Checking for prerequisites
18:10:36 [main] All prerequisites found
18:10:36 [main] Initializing Modules
18:10:36 [Apache] Problem detected!
18:10:36 [Apache] Port 80 in use by "Unable to open process" with PID 4!
18:10:36 [Apache] Apache WILL NOT start without the configured ports free!
18:10:36 [Apache] You need to uninstall/disable/reconfigure the blocking application
18:10:36 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
18:10:36 [Apache] Problem detected!
18:10:36 [Apache] Port 443 in use by "Unable to open process" with PID 4!
18:10:36 [Apache] Apache WILL NOT start without the configured ports free!
18:10:36 [Apache] You need to uninstall/disable/reconfigure the blocking application
18:10:36 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
18:10:36 [filezilla] XAMPP FileZilla is already running on port 21
18:10:36 [filezilla] XAMPP FileZilla is already running on port 14147
18:10:36 [mercury] XAMPP Mercury is already running on port 25
18:10:36 [mercury] XAMPP Mercury is already running on port 79
18:10:36 [mercury] XAMPP Mercury is already running on port 105
18:10:36 [mercury] XAMPP Mercury is already running on port 106
18:10:36 [mercury] XAMPP Mercury is already running on port 110
18:10:36 [mercury] XAMPP Mercury is already running on port 143
18:10:36 [mercury] XAMPP Mercury is already running on port 2224
18:10:36 [Tomcat] Java is already running on port 8005!
18:10:36 [Tomcat] Is Tomcat already running?
18:10:36 [Tomcat] Java is already running on port 8009!
18:10:36 [Tomcat] Is Tomcat already running?
18:10:36 [main] Starting Check-Timer
18:10:36 [main] Control Panel Ready
18:10:46 [Apache] Problem detected!
18:10:46 [Apache] Port 80 in use by "Unable to open process" with PID 4!
18:10:46 [Apache] Apache WILL NOT start without the configured ports free!
18:10:46 [Apache] You need to uninstall/disable/reconfigure the blocking application
18:10:46 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
18:10:46 [Apache] Problem detected!
18:10:46 [Apache] Port 443 in use by "Unable to open process" with PID 4!
18:10:46 [Apache] Apache WILL NOT start without the configured ports free!
18:10:46 [Apache] You need to uninstall/disable/reconfigure the blocking application
18:10:46 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
18:10:46 [Apache] Attempting to start Apache app...
18:10:46 [Apache] Status change detected: running
18:10:52 [mysql] Attempting to start MySQL app...
18:10:52 [mysql] Status change detected: running
18:10:57 [Tomcat] Java is already running on port 8005!
18:10:57 [Tomcat] Is Tomcat already running?
18:10:57 [Tomcat] Java is already running on port 8009!
18:10:57 [Tomcat] Is Tomcat already running?
18:10:57 [Tomcat] Attempting to start Tomcat app...
18:10:58 [Tomcat] Status change detected: running
18:10:59 [Tomcat] Status change detected: stopped
18:10:59 [Tomcat] Error: Tomcat shutdown unexpectedly.
18:10:59 [Tomcat] This may be due to a blocked port, missing dependencies,
18:10:59 [Tomcat] improper privileges, a crash, or a shutdown by another method.
18:10:59 [Tomcat] Press the Logs button to view error logs and check
18:10:59 [Tomcat] the Windows Event Viewer for more clues
18:10:59 [Tomcat] If you need more help, copy and post this
18:10:59 [Tomcat] entire log window on the forums
