Windows XP SP3 combines all previously released performance, security, and stability updates. It also provides a limited number of new and enhanced functionalities, although it does not significantly change the Windows XP experience or bring functionality from newer versions of Windows to Windows XP. The goals of Windows XP SP3 are to:
Provide a new baseline for customers still deploying Windows XP, to help them avoid the inconvenience of applying individual updates.
Fill gaps in the updates users might have missed by declining individual updates when using Automatic Updates, and to deliver updates not made available through Windows Update.
Windows Vista provides the most advanced security and management capability, but for PCs that cannot be upgraded to Windows Vista right now, Windows XP SP3 ensures these PCs have all available updates and allows these PCs to leverage some new Windows Server 2008 capabilities, such as Network Access Protection (NAP).
By increasing the number of TCP/IP connections allowed at one time, your internet speeds up, especially when you are downloading stuff or playing online games. I recommend you to set the limitation to 500 to 600.
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