Microsoft today finally released Service Pack 3 for Windows XP users. The update should now be offered via both Windows Update or Automatic Updates. The company was expected to release it last week, but pulled the plug at the last minute due to a compatibility problem with an obscure product they offer. Many readers have asked me whether this update is really necessary, given that there isn’t a whole lot new in Service Pack 3 aside from all of the security and non-security updates Microsoft has ever released for the operating system. The following are some of the things you should know about installing Service Pack 3 for Windows XP. Microsoft says it is not adding any significant Windows Vista technology into XP with Service Pack 3. No surprise there, given that Microsoft has said Service Pack 3 will be XP’s swan song: The company currently plans to stop issuing