Currently, Microsoft Office for Mac 2008 incorrectly assigns full read and write access to a nonadministrative user if the Mac is set up with multiple accounts. Depending on your environment, this could be a security problem. This will be corrected in a future update.
Workaround Using Terminal
1) Launch the Terminal application from the /Applications/Utilities
folder
2) Type the following command as one line and press return:
/usr/bin/sudo /usr/sbin/chown –h –R root:admin "/Applications/Microsoft Office 2008" "/Library/Automator" "/Library/Fonts/Microsoft" "/Library/Application Support/Microsoft"
3) Enter your administrator password when prompted
You can read more about this on Computerworld Microsoft offers quick fix for Mac Office 2008 bug
