I have a user on Excel 2010 who has a problem. Whenever she opens an Excel spreadsheet and selects some cells, nothing appears.
Normally, when you select cells in excel, you'll see a solid black outline of the cells you are selecting along with a blue background shading. She does not see either of these.
We know the selection is working because excel displays the cells that are being selected in the top left corner. Also, if she selects cells and makes some formatting change, the changes apply the cells she was trying to select - there's just nothing to indicate that the cells are selected.
This just occurred after uninstalling Office 2010 Home/Business from the Click-to-Run installer (comes on OEM Dell machines) and using physical media to reinstall.