I did a fresh install of Web Center and was starting up my managed server through the console: [Windows]
I got a bunch of errors in my log file and the deployment failed.
Find your nodemanager.properties -should be [Weblogic Dir]\wlserver_10.3\common\nodemanager
Change the line StartScriptEnabled=false to StartScriptEnabled=true.
Everything should work
If not check that you have the JFR stuff installed.