a similar situation occured at work, and I just thought I would post about it here as sort of a practice question.
You are the desktop support person of your department managing Windows XP professional desktops with Microsoft Office applications. A user calls you and states that there is data corruption in an excel file that she has been working on for many months.
The file is in a folder share located on your department server, and your system administrator is on holiday. You verify that no other files in the folder is corrupt, but the user insists that data is incorrect because dates and numbers appear as '######', what is the most likely cause of the problem?
A) The file is corrupt, restore a backup copy

Cells are locked
C) Cell Format needs to be configured
D) Cell is linked to an inaccessible location
E) Cell width needs to be configured
I overheard the situation and was able to provide the proper solution...heh....have fun~ and good luck!