I was experimenting with WAMP on my laptop, not a big deal in itself, but when I rebooted the Apache server failed to start.

Event logs showed something else had already been binded to port 80.

Quick Fix was to determine which PID had it by running the following:
netstat -ano
From there you can use task manager, determine the conflicting process, kill the PID.

(If you had CYGWIN installed)
netstat -ano | grep :80
ps -Wef | grep <pid> # To determine the process
kill -9 <pid>