If WAMP icon is ORANGE apache has not started so no apache or php logs can have been created.
Something is using port 80, there are many things that might be doing this
TeamViewer/Skype/IIS
Team Viewer and skype can be configured to not use port 80, IIS has to be uninstalled.
For how to reconfigure skype and TV see other posts in here.
left click wamp manager icon -> Apache -> Serv
Forum:
WampServer English