I have a MB Pro running 10.8.
I just did an iTunes update, did a CleanMyMac 3 cleanup and was running a Malware check when the app kept hanging part way through.

I forced shut-down to get out of the app and now I only get the blank log-in screen with a spinning ball.

Is there a way I can get around this or will I need a complete re-build?

Thank you.