You are the administrator of your company’s network. You want to deploy a Windows 2000 Professional service pack to 10 computers in the Development organizational unit. You create a Windows 2000 installer package file for the service pack.  You use the package file o successfully install the service pack to other computers in the domain. You assign the package file to the Development organizational unit. After the installation, you notice that the service pack was not installed on any of the 10 computers. You want to ensure that the service pack is successfully installed on the computers in the Development organizational unit.  What should you do?（）