A Little Security Stops Office From Opening Older Office Documents

Microsoft Office Service Pack 3 changed a registry entry to block Office 2003 from opening older Word, Excel, and Power point file because they can pose a security risk. The can present a problem for AutoPLANT 2004 users because its reports output in an older word format.

 

This Microsoft knowlagebase article http://support.microsoft.com/kb/938810 details the steps to allow office to open older files.