Windows 98, Windows 98 Second Edition, and Windows Millennium Edition Support ends on July 11, 2006
http://support.microsoft.com/gp/lifean18
Support for Windows 98, Windows 98 Second Edition, and Windows Millennium Edition (Me) ends on July 11, 2006. Microsoft will end public and technical support by this date. This also includes security updates. Microsoft is providing final notifications to customers to end the extended security update support for these products.
Windows XP SP1 and SP1a support ends on October 10, 2006
http://support.microsoft.com/gp/lifean19
Support for Microsoft Windows XP Service Pack 1 (SP1) and Service Pack 1a (SP1a) ends on October 10, 2006. Microsoft will end support on this date. This also includes security updates for these service packs. Microsoft is providing final notifications to customers regarding the end of support for these products.
