Windows XP SP2 is more than the usual roll-up of bug fixes and updates. It is also being used to make significant changes to the software that are designed to improve security.

Service Pack 2 for Windows XP, originally planned to ship in the first half of the year, will now at best be released in July. The major, security-focused operating system update doesn’t yet ...

Windows XP SP3, which is scheduled to include security patches, bug fixes and other housekeeping updates as well as some new add-ons, was until recently scheduled for release sometime next year.