Application Compatibility Toolkit (ACT)

Application Compatibility Toolkit (ACT) is a set of freely downloadable program utilities and related documents from Microsoft for ensuring compatibility among application programs in Windows operating systems, especially in a large network environment. The Toolkit can also be used to diagnose and fix problems that may be related to compatibility. The Toolkit can be used for applications running in Windows 2000 with Service Pack 3 or later, Windows XP, and Windows Server 2003. Microsoft says that the tools can be used to resolve over 200 symptoms of problems.

The tools consist of:

  • An Application Compatibility Analyzer that is used to systematically pinpoint compatibility issues
  • An Application Verifier that is used during development to ensure that no compatibility issues can be identified
  • A Compatibility Administrator that is used to select and apply specific compatibility fixes and then deploy the fixes to other computers

The Toolkit can be downloaded from Microsoft's Web site or ordered for delivery on a CD. The Analyzer and the Verifier can also be downloaded or ordered separately.

This was last updated in September 2005

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