Currently Being ModeratedJan 30, 2013 7:49 PM (in response to cookiemac)
Do you have the M$ Word/Office install disc? Just reinstall.
As an alternative, you can download and install the free NeoOffice http://download.neooffice.org/neojava/en/index.php
NeoOffice is equivalent to Microsoft Office. It can open Excel files, Word files & PowerPoint files. You can also create these types of files that can be opened by PC users.