Unable to start AD manager plus

Unable to start AD manager plus

Hi, Were having an issue regarding AD manager plus, tried to start the service, but it wont start.
 
See error below after I execute RUN.BAT: 
 
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Starting Server from location: C:\ManageEngine\ADManager Plus
Port 80 already in use. Change WebServer port in <ProductHome>/conf/server.xml
Problem while Starting Server !!
C:\ManageEngine\ADManager Plus\bin>


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Hope you can help us on this.
 
Many thanks.

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