Step 1: Download the appropriate update from Microsoft
Step 2: Determine the silent install options
Running the installer with a /? option revealed the available command line options. Of interest are the following:
Quiet Mode (no user interaction or display)
Do not restart when installation is complete
Prompt if restart is required
/warnrestart[:< seconds >]
Warn and restart automatically if required (default timeout 30 seconds)
Use at least the /quiet option, and select which restart option makes the most sense for your environment and users.
Step 3: Select computers to receive deployment
In the Targets pane enter the name(s) of your target computers. You may also select targets via Active Directory Organization Units (OU), Admin Arsenal Collections, .csv, .txt or .aatarget files
Step 4: Deploy
Deploy and watch the magic. Service Pack 3 is quite large and will take as long as 30 minutes to install, depending on the speed of the connection and computer.