A typical screen of the Windows System State Analyzer:
As you can see, the interface is divided into two panes, each of which is for a separate snapshot that you wish to compare. An amazing feature about this tool is that you can choose what you wish to include in the snapshot for comparison. You can compare drives, registry keys, services or drivers. This is how it looks:
It allows you store detailed reports in simple .html files too! The Detailed Report displays the change summary and details filtered based on file extension and various other file properties. This is how a sample report looks like:
This tool is a part of the Windows 2008 R2 Logo Software Certification and Windows 2008 R2 Logo Program Software Certification toolkits. Hence you will need to download the toolkits to get the System State Analyzer tool.
Download the Server Logo Program Software Certification Tool
(x86): here and (x64): here