- 1). Open your computer's Control Panel by clicking the Windows Start button and selecting Control Panel.
- 2). Click "Security" and select "Windows Update."
- 3). Click "Check for updates" from the task menu on the left side of the screen to search for updates available for your current operating system.
- 4). Check the box next to Windows XP Service Pack 3 and click "OK" to select the update.
- 5). Click "Install Updates" to proceed with installation of the selected update.
- 6). Follow prompts as required to proceed with installation of the update. Some systems may require a reboot to enact the system changes.
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