You are the administrator of a Windows 2000 network that has 1,500 Windows 2000 Professional computers. Microsoft Office 2000 was assigned to all the computers on the network by using a Group Policy object (GPO).  You deploy the Office 2000 service release to all the Windows 2000 Professional computers on the network. The service release, in addition to other software that had been assigned, fails to install on only one of the computers.   What should you do? （）