Colin should read the manual that came in the Norton Internet
Security 2005 box and that is available for download from
Norton's website. I don't have NIS2005, so I can't give Colin
specific instructions, but here is what other users have said
about disabling the Office Plugin in newer versions of Norton:
To disable the Office plug-in in Norton AntiVirus 2006:
1. In Norton Protection Center, click Options.
2. Click Norton AntiVirus.
3. Click Miscellaneous.
4. Uncheck Turn Office plug-in on.
5. Click OK.
Open Norton Internet Security 2007
Click the "Norton Internet Security Tab"
Under Settings, click Basic Security - Auto Protect
Configure
From the left panel select Advanced Options
At the bottom, uncheck "Turn on scanning for MS Office documents."