I had a weird anamoloy in Excel where the quick keys [Ctrl]+C was not
copying, instead it appeared to randomly delete a column of data. A very
undesirable effect. So to correct the issue I went to the add/remove
programs and selected the Microsoft Office Professional Edition 2003, then
clicked "Click here for Support" and selected "Repair". The repairs process
took <10minutes and corrected this strange behavior. Hope this helps.