• Service Pack 2 added a variety of security updates and features to Windows XP, including a new firewall and Security Center. Service Pack 2 is not the most recent update for XP: Service Pack 3 is available for all legitimate copies of the operating system. As of 2010, Windows has discontinued support for XP's Service Pack 2.
  
  

Operating System

• If you are installing SP2 as an update, you must have Windows XP on your computer before you begin. Any 32-bit version of XP will work--Professional, Home, Media Center, etc. It is not compatible with the 64-bit version.
  
  

Processor

• A 233 MHz processor is the minimum that will handle XP Service Pack 2.
  
  

RAM

• Windows XP Service Pack 2 needs at least 64MB of random access memory, or RAM, to function properly.
  
  

Hard Drive

• Service Pack 2 requires a minimum of 1.8GB of free space on your hard drive.