Windows XP/5.1.2223.1.main.000411-2307

Build 2223 was branded as "Microsoft Windows Whistler 2001" in the screensaver and "Whistler 2001" in the Start menu. Setup also referred this build as "Windows Whistler Professional." However, About Windows referred to this build as Windows 2000 Professional. Build 2223 is the earliest Whistler build to have the Neptune style Welcome Screen. This build did not contain the Watercolor theme.