How to obtain the latest Windows XP service pack
http://support.microsoft.com/kb/322389
HOW TO get a computer running WinXP Gold (no Service Packs) fully patched (after a clean install)
http://groups.google.com/group/microsoft.public.windowsupdate/msg/3f5afa8ed33e121c
You can download the installer (EXE) for SP2 here (ignore the "DO NOT CLICK DOWNLOAD IF YOU ARE UPDATING JUST ONE COMPUTER" blurb): http://www.microsoft.com/downloads/details.aspx?FamilyId=049C9DBE-3B8E-4F30-8245-9E368D3CDB5A
Windows XP Service Pack 3 - ISO-9660 CD Image File
[You CANNOT use the WinXP SP3 ISO if WinXP SP1 isn't installed, despite what System Requirements section sez; the WinXP SP2 ISO is no longer available]
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=2fcde6ce-b5fb-4488-8c50-fe22559d164e
Also see...
4 steps to help protect your new computer before you go online
http://www.microsoft.com/security/pypc.aspx
WinXP SP3 (and SP2) - Read all prerequisites for a successful installation
http://msmvps.com/blogs/harrywaldron/archive/2008/05/08/windows-xp-sp3-read-all-prerequisites-for-a-successful-installation.aspx
Note: Support for WinXP SP2 ends on 13 July 2010. After that date, computers running WinXP SP2 "will no longer receive software updates from Windows Update" until SP3 has been installed. Extended Support for WinXP SP3 will continue through
08 April 2014.
• What does it mean if my version of Windows is no longer supported?
http://windows.microsoft.com/en-us/windows/help/what-does-end-of-support-mean
~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft