Every developer should know about the latest features of the operating system they are targetting, especially the new security features and how they may impact existing and new applications. Training on the security features of Windows XP SP2 is close to my heart, so I was delighted to see the free Clinic titled "Developing and Maintaining Applications on Microsoft® Windows® XP Service Pack 2".
Here's the overview of this 6 hour self-paced course: This online clinic provides students with the knowledge and skills to understand the security enhancements included with Microsoft® Windows® XP Service Pack 2 (SP2) and how these features may affect applications that need to run on Windows XP SP2.
You can find Clinic 2853 at https://www.microsoftelearning.com/eLearning/offerDetail.aspx?offerId=11678