macbook pro install spinning

I have just downloaded Creative cloud and am trying to install on my 2010 MacBook Pro with OS 10.9.3

When I install I am not getting the signon button, just a blue spinning. I saw the signon button blip by once but then it went right to the spinning.

I enabled and am installing as root (found in another article)

I've rebooted the Mac

Nothing is working

It sounds like this is a common issue, what has worked for others?

Thanks

Ali