NET Frameworks 4.0, 3.5, 1.1, 1.0 are included in this package.NET Framework 1.0 will be installed only with Tablet PC Edition or Media Center Edition (Upgrade only).NET Framework 4.0 is disabled by default. It includes all updated components and hotfixes for Windows XP in a single, convenient package. Except for the SP4 package installer main executable (update.exe) and a cosmetic resource modification sysdm.cpl no other binary file has been modified, everything is original from Microsoft Corporation. Windows XP SP4 can installed on any version of Windows XP with SP1 or later installed or slipstreamed into any Windows XP installation source (except for Embedded versions). Windows XP SP4 (Service Pack 4) is a cumulative update rollup for Windows XP. Welcome to Windows XP Service Pack 4 (Unofficial).