
Windows XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers' experience with the operating system. This specific package also contains debugging symbols specific to binaries included in Windows XP Service Pack 3.
Windows XP Service Pack 3 is a cumulative update of all previous service packs for XP. Otherwise it will prompt to install either XP SP1 or SP2. Since SP1 is no longer available for full download, it would need to be downloaded using Windows Update. The other option is to manually change the registry key, in essence fooling the installer into thinking SP1 is already installed.
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Download Windows XP Service Pack 3 ISO-9660

Windows 7 Service Pack 1 (SP1) is an important update that includes previously released security, performance, and stability updates for Windows 7. Windows 7 Service Pack 1 also includes new improvements to features and services in Windows 7, such as improved reliability when connecting to HDMI audio devices, printing using the XPS Viewer, and restoring previous folders in Windows Explorer after restarting.
Installing Windows 7 Service Pack 1 helps keep Windows 7 up to date.
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