Track Changes Author Not Showing UP

[ronksmith]

Here's one that will curl your hair. In a word document with track changes you can normally roll over the changes with your mouse and see who made the change and when inside a little white bubble. Nice and neat. When we load that same document in an HP 8460p EliteBJook, that roll over function does not work. Tried in on 9 notebooks, same problem. Load the document on 10 other different machines, track changes works perfectly. Why on this notebook would it not work?