Microsoft Windows XP Service Pack 3 (SP3) 包括了自2001年Windows XP發(fā)布至今的全部升級補丁，也包含少量新功能特性。安裝SP3并不會想XP SP2那樣明顯改變用戶體驗。SP3的主要新功能包括：黑洞路由偵測；網(wǎng)絡(luò)訪問保護（NAP）；安全選項界面更詳盡；增強的管理員安全和服務(wù)策略；內(nèi)核模式加密模塊；Windows產(chǎn)品激活模式改變。

Microsoft Windows XP Service Pack 3 (SP3) provides new proactive security technologies for Windows XP to better defend against viruses, worms, and hackers along with increased manageability and an improved experience for users.

Microsoft Windows XP Service Pack 3 fixes a range of bugs in Windows XP. It doesn't matter what XP updates you have previously applied to your system, SP3 will update any unpatched, partially patched or completely updated system (it includes all previously released patches and updates). XP SP3 fixes the security holes so you won't get attacked.

Microsoft periodically combines updates, fixes, and other improvements into a single package - Service Pack. Microsoft develops updates, fixes, and other improvements that address issues reported by the company’s customers and partners. To make it easier for customers to get these updates and enhancements, Microsoft periodically combines them into a single package, and makes that package available for all Windows customers.

These packages are called service packs", Microsoft revealed in the introduction of the Overview of Windows XP Service Pack 3. With the Release Candidates of Vista SP1 and Windows Server 2008 heading to increased testing pools the past week, and with Microsoft cooking the first public build of the first refresh for its latest Windows client, the official overview for XP SP3 is the only crumb from the service pack fiesta over at the Redmond company. The Release Candidate of XP SP3 in a pre-final stage has already shipped to MSDN and TechNet subscribers.