Macbook pro stuck on boot - "AppleUSBHostPort::interruptOccurred: overcurrent detected" I am trying to reinstall OSX on a MacBook Pro Mid-2009 but it hangs on startup.
I have used several disks but now when running in verbose mode see that it hangs at 
"AppleUSBHostPort::interruptOccurred: overcurrent detected"
and loops here.

Image of messages during startup:
You have a hardware problem with your USB ports and it's physical. It try to disable de USB ports but they can't so they throw this error.

It's hardware related, you can do nothing about.