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 bot
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WampServer English