If this per-machine system policy is set to 1, no package on the system gets the shared component functionality enabled by the msidbComponentAttributesShared attribute in the Component table. The default value is 0, which enables the shared component functionality for components marked with msidbComponentAttributesShared in all packages.

Windows Installer 4.0 and earlier: Not supported. This function is available beginning with Windows Installer 4.5.

Registry Key


Data Type