When you install a service pack, the installer activates the Print Spooler service if it’s not already running. However, if you’ve disabled the start-up type for this service, the service will fail to start and the computer will display the following error message:
Cannot install the Service Pack.
The Print Spooler service is not started.
To resolve this problem, perform the following steps to set the service start-up type to manual:
Start the Microsoft Management Console (MMC) Computer Management snap-in (go to Start, Programs, Administrative Tools, and click Computer Management).
Select the Services and Applications branch.
Right-click Print Spooler, and select Properties.
Under the “Startup type:” setting, select Manual.