After release beta 2, on August 1, 2001. Microsoft reach launching Whistler to Windows XP, also Windows 2000 sounds took leaked to Windows XP in lifetimes, in August 11, 2001. Microsoft release build 2600 for normal Whistler, build 2428 is leaked on August 23, 2001. Microsoft release to office for Windows XP on August 24, 2001. In the five day installing Whistler beta 3, codename Whistler was change to Windows XP on August 31, 2001. Also Windows XP by Microsoft launching on October 2001, in Service Pack 3.