Microsoft has recently released the Windows XP Service Pack 3 Release Candidate. This is not a product grade release and is intended to allow system administrators and IT professionals to test features compatibility before installing the actual production release. Users who want to test the new service pack can download and install on their PCs to have a feel of it.
As Microsoft has noted, there isn’t much of features from the newer version of Microsoft operating systems like Windows Vista. However, there are some features included in the Windows XP SP3 release.