In security center it is red and says virus scanner is off or not detected, I forgot which it says. But it says there is no virus scanner and background is red.
As stated above, after checking for updates, the Windows alert is cleared. This happened on two different boxes running XP Pro SP3.
Its actually a bug in Windows security center - Repository that causes, it not to recognize any of the antivirus installed in the machine. As far as you have McAfee installed and enabled, you ccan ignore the warnings from windows security center.
McAfee Online Community Moderator
Just in case you didn't see how I cleared it, I did a manual "Update" on McAfee and the message cleared.