Seems a port conflict issue.

Besides 8080, there are some other ports used by Geronimo:
"Listening on Ports:
    1050 CORBA Naming Service
    1099 RMI Naming
    1527 Derby Connector
    2001 OpenEJB ORB Adapter
    4201 OpenEJB Daemon
    6882 OpenEJB ORB Adapter
    8009 Tomcat Connector AJP AJP
    8080 Tomcat Connector HTTP BIO HTTP
    8443 Tomcat Connector HTTPS BIO HTTPS
    9999 JMX Remoting Connector
   61613 ActiveMQ Transport Connector
   61616 ActiveMQ Transport Connector"

Try to run geronimo with "Geronimo.bat run", then you can see which module is failed to start.