NET 1.x, 3.5 versions are automatically installed/updated in live installations. NET Framework 1.1, 3.5 and 4.0 until January 2016 have been included. NET Frameworks 4.0, 3.5, 1.1 and 1.0 (Tablet PC only) are included in the Windows XP SP4 package. Request-only hotfixes have been included. It includes updates for most Windows XP components, including MCE and Tablet PC. It can be applied to a live Windows XP system which has SP1, at minimum, installed or it can be slipstreamed (integrated) in any Windows XP installation media. Windows XP Unofficial SP4 ENU is a cumulative update rollup for Windows XP (x86) English. Many users who won’t be able to upgrade their old machines to a newer OS would like to easily install all Windows updates in one convenient package. Microsoft Windows XP official support has ended. It doesn’t matter what XP updates you have previously applied to your system, Service Pack 4 will update any unpatched, partially patched or completely updated system (it includes all previously released patches and updates). These security enhancements address issues not fixed by Microsoft updates.

Windows XP SP4 fixes a range of bugs in Windows XP operating system and includes registry updates to enhance security. Windows XP SP4 (Service Pack 4) provides the proactive security technologies for Windows XP to better defend against viruses, worms, and hackers along with increased manageability and an improved experience for users.

Windows xp sp4 unofficial