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Uninstall checks allow you to check the Microsoft software installation registry keys (as displayed in Windows' Add/Remove Programs section) for the existence of a particular package. Microsoft maintains the list
of applications installed and available for uninstallation in the ''HKLM\Software\Microsoft\Windows\Current Version\Uninstall '' registry key. The value in the DisplayName key of a
particular package is what's matched by this check. The only condition available for this option is ''exists''.