Operating System: Windows XP
Application: MS Outlook
Attachment: Excel files

Problem:

Until yesterday, I was able to open my Excel file
attachments from my e-mail.  

However, when I try to open the file, a blank sheet
appears.  Then, when I try to close the file, the
following message appears: "This system cannot find the
file specific."

If I save the file to my hard-drive, I can open the Excel
file and view the contents of the worksheets. I've
checked the Task Manager to see if the Excel executable
has been running (it is not).  I've also rebooted my PC,
but this problem continues to appear.

*  What is causing this problem?
*  How do I resolve it and view my Excel attachments
through my e-mail?

Thank you in advance.

- Amiller