Where is Microsoft Standard User Analyzer tool?

Microsoft Standard User Analyzer (SUA) tool enables you to test your applications and to monitor API calls to detect potential compatibility issues due to the User Account Control (UAC) feature in the Windows Vista. The tool is part of the Microsoft Application Compatibility Toolkit. It requires Application Verifier but if Application Verifier is not installed on your computer you will receive a prompt to download it.

For more information on how to use this tool, check out this TechNet article.