RegShot is an excellent registry tool that helps anyone to compare the changes that have been made to the Windows registry before and after some set of operations have taken place, It saves a snapshot of registry before and after the operations and then displays the difference neatly in a text file for you to compare and analyze .
RegShot is an Open Source software available from SourceForge and so is totally free for use, It has a very simple GUI wherein you save a snapshot of your registry named as "1st shot' and then you do your installations,uninstallations,Program changes or anything to your computer and after you are done you can take a 2nd shot and later on you can compare them , giving you results in a text file showing deleted,modified,added key/values.
RegShot provides feature to save comparison log as text or html file, thereby giving you neatly formatted comparison report enabling you to quickly see the differences, I would recommend this registry utility to everyone as it saves your time in finding the fault in case you or any other program does some unwanted changes to your registry.
