It simply means that your Windows Security Center is disabled. You may have done this on purpose to get rid of the dumb "security" warnings if you had no anti-virus or one that was not recognized by Windows. Just right click on the result and choose to exclude it from further searches.
EDIT-- If you want to re enable it for some reason, open up control panel, and click on the Security Center icon, and re enable it manually.
Edited by madman6510, 10 May 2007 - 10:57 PM.