iTunes window won't show up?

I've tried repeatedly reinstalling, updating, etc...
It started on iTunes 11.0.2
Is still a problem on 11.0.3
I've scanned for viruses, I've checked everything
The window opens for a split second when I start iTunes and then disappears
Everything is greyed out in the top bar menus

I can open the equalizer and get pop-up messages from iTunes but no window.
I've checked the expose and everything the window isn't hiding, it just won't open. It's simply not there.