- Windows XP SP1a (xpsp1a_en_x86.exe) must be installed before any of the MS security updates.
- Windows XP Update Rollup 1 (WindowsXP-KB826939-x86-ENU.exe) should be installed after Windows XP Service Pack 1.
- Note: Windows XP update rollup is a cumulative packaged set of hotfixes, security patches and critical updates released on Oct 2003
The following note is from Microsoft regarding Windows 2000 Service Pack 3:
The Windows 2000 SP3 Network installation includes all of the Windows 2000 SP3 files needed for installation on Windows 2000 Professional, Server, Advanced Server, or Server Appliance Kit. This is an ideal download mechanism for IT professionals who require a downloadable copy of Windows 2000 SP3 that they can use for network deployment.
Anti-virus software programs may interfere with the installation. Please disable anti-virus software while installing Windows 2000 SP3.
If you have not installed a previous Windows 2000 Service Pack, you only need to install Windows 2000 SP3 to get all of the Windows 2000 updates. If you have already installed a previous Windows 2000 Service Pack, Microsoft recommends that you install Windows 2000 SP3 without uninstalling the previous service pack.