Microsoft Windows XP Professional x64 Edition, released on April 25, 2005, is an edition of Windows XP for x86-64 personal computers. It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture. [1] Windows XP Service Pack 2, or SP2, was a major update for Windows XP, which was released by Microsoft on August 25, 2004. It was succeeded by Windows XP Service Pack 3 on July 10, 2008. Service Pack 2 included many important addons and updates: Security - Huge security updates were included in REDMOND, Wash., Aug. 6, 2004 — Microsoft Corp. today announced the release to manufacturing of Windows XP Service Pack 2 with Advanced Security Technologies. Service Pack 1 (SP1) for Windows XP, which was about 130MB (compressed) in size, fixed 324 errors in the operating system. Service Pack 2 (SP2), which will ship in mid-2004 at the latest, is The RC2 code that was made available Monday had been promised for release in mid-May, but the date shifted after Microsoft confirmed last month that the final release of Windows XP2 had slipped my8YB1.