Microsoft set up a web page to help people figure out if a Microsoft security-related message is genuine. There quite a few words and a couple of pretty pictures, but I can sum the whole thing up in a couple of sentences. Ways to know it's a Microsoft security warning: 1. It's a patch for the patch you rolled out last week. 2. 3 of them were issued at the same time. 3. It addresses the symptoms and not the problem. 4. The security information that prompted the patch to be created was released at least 6 months prior.