To startWebSphere_Portal, the startServer.bat, located in the wp_profile/bin directory of the WebSphere installation, should be used:
<WEBSPHERE PORTAL INSTALL DIR>/wp_profile/bin/startServer WebSphere_Portal. The default profile name during installation is "wp_profile", if you have customized the profile name then that must be used instead of "wp_profile" above.
Alternatively, the Administrative Console can be started from .