Microsoft finally releases its highly anticipated Service Pack 3 (SP3) for Windows XP today. But not without some hiccups.

SP3 was found to be incompatible for users running Microsoft Dynamics RMS, hence, an official release on Microsoft Download Center and Windows Update is not available at this time.

But, you can still grab the service pack from their download.windowsupdate.com domain:
Chinese (Hong Kong), Czech, English, French, German (Deutsch), Hebrew, Japanese, Polish, Russian, Simplified (Chinese), Spanish, and Traditional Chinese.

As long as you are not running Microsoft Dynamics RMS, it is perfectly safe to install SP3 now. But, beware of undiscovered bugs that often haunts any major software updates.

Windows XP SP3 Overview

SP3 includes the hundreds of updates and fixes released since SP2. And it includes four features that are backported from Windows Vista. Nothing too exciting for the average consumers though.

• NAP is a policy enforcement platform meant for enterprise use that blocks systems attempting to access a network until they meet whatever security criteria the corporation has in place.
• “Black Hole” Router Detection helps detect and protect end users from a router that drops packets without returning the specified Internet Control Message Protocol response.
• Microsoft Kernel Cryptographic Module incorporates cryptographic algorithms in a single module other kernel mode drivers are capable of hooking into and accessing.
• The new Product Activation module allows users to install XP without entering a product key at installation.

Other new features include:

• A more descriptive Security Options control panel user interface.
• Enhanced security for Administrator and Service policy entries.

For more in-depth details on SP3, download Overview of Windows XP Service Pack 3.pdf from Microsoft.