Please can anybody help me ?
The error which you are getting [java.lang.IllegalStateException: WFLYSRV0121: Configuration directory does not exist: C:\...\wildfly\standalone\configuration] indicates that you need to check if you have the directory with name "configuration" inside "standalone" folder.
Simple check :
1. The directory where you extracted wildfly you should file the "standalone/configuration" in the root installation directory of WildFly. Check that directory exist or not.
2. The file with name "logging.properties" exist inside the "standalone/configuration" or not ?
Also can you paste the complete path of your WildFly installation ?
how do you start wildfly?