Diff tool for the whole OS

I vaguely remember remember reading about a (new?) tool that can diff a computer. I think it was from Microsoft aimed at developers and it could find difference in files, file versions, registry keys, etc.

Now we need this tool for a project where an installer has gone bad.

Anyone know开发者_如何学编程 what tool it is? Or similar tools?

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You might want to try the beta of Microsoft's

Attack Surface Analyzer

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I also found this comercial product: http://www.blueproject.ro/systracer