AppSearch (min: 0, max: unbounded): Uses file signatures to search for existing versions of products.
CCPSearch (min: 0, max: unbounded): Uses file signatures to validate that qualifying products are installed on a system before an upgrade installation is performed.
CostFinalize (min: 0, max: unbounded): Ends the internal installation costing process begun by the CostInitialize action.
Custom (min: 0, max: unbounded): Use to sequence a custom action.
ExecuteAction (min: 0, max: unbounded): Initiates the execution sequence.
FileCost (min: 0, max: unbounded): Initiates dynamic costing of standard installation actions.
FindRelatedProducts (min: 0, max: unbounded): Runs through each record of the Upgrade table in sequence and compares the upgrade code, product version, and language in each row to products installed on the system.
IsolateComponents (min: 0, max: unbounded): Installs a copy of a component (commonly a shared DLL) into a private location for use by a specific application (typically an .exe).
LaunchConditions (min: 0, max: unbounded): Queries the LaunchCondition table and evaluates each conditional statement recorded there.
MigrateFeatureStates (min: 0, max: unbounded): Used for upgrading or installing over an existing application.
ResolveSource (min: 0, max: unbounded): Determines the location of the source and sets the SourceDir property if the source has not been resolved yet.
RMCCPSearch (min: 0, max: unbounded): Uses file signatures to validate that qualifying products are installed on a system before an upgrade installation is performed.
ScheduleReboot (min: 0, max: unbounded): Prompts the user to restart the system at the end of installation. Not fixed sequence.