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. Currently, Microsoft.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 the minimum, installed or it can be slipstreamed (integrated) in any Windows XP installation media. 3.1b is expected to be the final release. Windows XP Service Pack 4 Unofficial is a cumulative update rollup for Windows XP (x86) English as well as security enhancements not addressed by Microsoft.
