When seeing IT WORKS! most likely you have IIS running
Make sure no other program conflict Wamp such as IIS, Microsoft Web Deploy, Web Deployment Agent Service, SQL, Skype, Zonealarm, firewall/antivirus, NOD32, Eset, any web related program including Remote Desktop, Teamviewer or Apache, MySQL, PHP outside wamp folder (ie. in Program Files or System32 folder) ...
IIS and Apache/Wamp are both web server and might conflict in some way, so you have to disable IIS in order for Wamp to work
Disable IIS in Vista/W7:
Control Panel, Uninstall Programs, Turn Widows Features On or Off, uncheck Internet Information Services
Disable IIS in XP:
Control Panel, Add/Remove Programs, Add/Remove Windows Components, uncheck Internet Information Services (IIS)
Restart computer, then restart Wamp
Also, in folder C:\WINDOWS\System32\drivers\etc, open file hosts and delete anything in this file and have only this line below and nothing else
127.0.0.1 localhost
If using Skype, open Skype > Tools > Options > Advanced > Connection then uncheck "use port 80..." restart Wamp then Skype
Have fun,
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