Apache on Windows XP - failure on starting

Errors

[1] Could not reliably determine the server's fully qualified domain name
[2] (OS 10048) only one usage of each socket address (protocol/network address/port) is normally permitted. : make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down

Solution

[1] Add/Modify directive - ServerName <Your IP>:<Your Port>
[2] Add/Modify directive - Listen 127.0.0.1:80

Now start apache. If still error [2] remains, change the port number and try.