One or more operations processed together as a single indivisible WHOLE CALLED a transaction. All the constituent operations must succeed for the transaction to succeed, otherwise all the operations are rolled back to the original state.

Windows Installer 4.5 includes SUPPORT for installing multiple packages using transaction processing. The packages are CHAINED together and processed as a single transaction. If one or more of the packages in the transaction cannot be installed successfully or if the end USER cancels the installation, the Windows Installer initiates rollback for all of the packages to restore the system to its earlier state.

One or more operations processed together as a single indivisible whole called a transaction. All the constituent operations must succeed for the transaction to succeed, otherwise all the operations are rolled back to the original state.

Windows Installer 4.5 includes support for installing multiple packages using transaction processing. The packages are chained together and processed as a single transaction. If one or more of the packages in the transaction cannot be installed successfully or if the end user cancels the installation, the Windows Installer initiates rollback for all of the packages to restore the system to its earlier state.