Where to start in Microsoft Security?

I can recommend you to browse http://www.microsoft.com/technet/security/default.mspx as a top level page to find out what’s important with security from a technical perspective. Besides, there are a Link called “Want Less Technical Detail?” which is suitable to end users.You can refer you family or friends to visit this link and view the short videos about preventingMalware, Phishing, Pharming, Spam…etc.