Today, our EW6 froze several times. The mouse disappeared when I hovered over the EW palate. It would re-appear when I moved the mouse off of the palate. I had Powerpoint open (not sure that had anything to do with this). I did a quick control+alt+del and stopped EW. I then restarted it. This happened 4 times during the service, probably within 5-7 minutes. I had no choice but to restart the computer. It seemed to work after that. This has happened before.

You may need to call tech support so that we can trouble shoot the issue.

I checked and our preview pane was already off.

I saw this happen today on a machine. See if this helps. In EW when you add the PowerPoint turn off the preview pane. I have added an image below that shows you what I am talking about.
[attachment=0:1bevkdt1]previ.png[/attachment:1bevkdt1]