Windows XP build 3790.1173

Windows XP build 3790.1173 is a beta build of Windows XP Professional x64 Edition. This build was shown in the Japanese IT news site PC Watch in an article. It demonstrated the capabilities of the AMD64 environment on Windows and how it compares to the ia64 64-Bit Edition 2003. It also shows application differences between x86 and x64, such as Internet Explorer and Windows Media Player. This build hasn't been leaked as of today. It also has the Luna theme that was absent in earlier x64 and ia64 builds.