Windows XP Service Packs are collections of updates, fixes and/or enhancements. You can learn more about Service Packs below.
http://en.wikipedia.org/wiki/Service_pack
Windows xp service pack 3 is an updated package, which includes all previously released windows xp updates including security updates & hotfixes.It allows pc's with windows xp as operating...
A service pack contains a lot of updates and new programs. Service pack 3 is the same, but many people have had problems with it. You might want to stick with service pack 2 for awhile.