I was trying my hands on the latest Windows SDK and came across this link which I felt is a must bookmark for developers who like to build applications using native (Win32) or the .NET Framework programming models
Here’s the link: Which SDK is Right for Me?
This link helps you decide the SDK you would require, depending on the version of Windows and .NET Framework you will be building applications for. Here’s a screenshot of the chart
Very useful indeed!
You may also want to take a peek at the Windows SDK Frequently Asked Questions (FAQ)