I'm guessing you must be on XP SP3. The GPP CSE install package still hasn't been updated to detect SP3. You'll have to manually download and install it.
To get the latest release version, I always grab from the WU catalog site: http://catalog.update.microsoft.com/v7/site/Home.aspx Scott Klassen ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~
