There often arises a need to figure out what may have changed on a system, either due to a specific issue or even to compare the difference between two systems. Today I would like to introduce you to the Windows System State Analyzer utility. Unless you are a developer or tester, you probably have never heard of this tool, as it is part of the Windows 2008 R2 Logo Software Certification and Windows 2008 R2 Logo Program Software Certification toolkits. The basic functionality of the System State Analyzer tool is to allow you to compare two snapshots taken at different points in time. This allows you to compare the state of a machine both before and after an application install for instance. Today I will give you a run-through of what the tool looks like while doing a compare of a system both before and after installing a software package, in this case Virtual PC 2007. The initial UI will look something like this: 
As you can see, the interface is divided into two panes, each of which is for a separate snapshot that you wish to compare. You start by naming the first snapshot. By default, you are given several default name instances such as Post Install, Pre Configuration or Custom.
The Tools – Options menu is where you can choose what you wish to include in the snapshot for comparison. You can compare drives, registry keys, services or drivers.
Read more: Ask the Performance Team
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