1. Click the 'Start' button on your computer, click 'All Programs' and then select 'Windows Update' or 'Microsoft Update' from the program list.
2. Click the 'Express' button to check for high-priority updates for your computer.

3. Wait while the update utility checks your computer to see what version of your operating system you are running.
4. Select the 'Service Pack 3' update and then click the 'Install Updates' button. Wait for your computer to install the service pack and then restart your computer once the installation is finished. The installer error 1619 problem will now be gone.