I am trying to open up jdeveloper 11g and it is doing nothing. I am getting the following error when I run jdev.exe

```
IDE boot startup failed.
java.lang.NoClassDefFoundError: oracle/classloader/SharedCodeSourceURL
        at oracle.ide.boot.IdeLauncher.initURLStreamHandlerFactory(IdeLauncher.j
ava:146)
        at oracle.ide.boot.IdeLauncher.launchImpl(IdeLauncher.java:87)
        at oracle.ide.boot.IdeLauncher.launch(IdeLauncher.java:65)
        at oracle.ide.boot.IdeLauncher.main(IdeLauncher.java:54)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at oracle.ide.boot.Launcher.invokeMain(Launcher.java:713)
        at oracle.ide.boot.Launcher.launchImpl(Launcher.java:115)
        at oracle.ide.boot.Launcher.launch(Launcher.java:68)
        at oracle.ide.boot.Launcher.main(Launcher.java:57)
Caused by: java.lang.ClassNotFoundException: oracle.classloader.SharedCodeSource
URL
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:305)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:246)

```

I attempted to install oracle servicce bus and oracle database express edition, is it possible that some file was overwritten?