Warnings for unsafe sites not working

Hi, I’ve moved from XP to a Windows 7 PC, so I installed my copy of Internet Security 2010 on the new PC and it seems to be working fine. However, the feature which warns of unsafe sites in Google with a red star (not sure of the feature name) doesn’t work. When I search with Google, each site has a star but they’re all clear, none are green or red etc. Today I entered a site from Google, again with no status available, only for the red warning to flash up in the corner once I’d accessed it. Can anybody give me advice on how I can make the feature work properly by warning me in advance?