There is a immediate custom action scheduled before CostInitialize Action . What Exec Condition should be used , so that custom action doesn't execute during "Uninstall"? REMOVE="ALL" is only valid after InstallValidate. So any other condition , so the custom action can be executed in all condition except "Uninstallation" ? Based on this custom action , feature condition need to be set .So the custom action have to remain before feature state is set in the sequence.