Windows 8 build 7973 (fbl srv wdacxml)

Windows 8 build 7973 (winmain) is an unleaked Milestone 3 build of Windows 8. Only two desktop screenshots and part of the about dialog of this build were showcased. However, the about dialog screenshot is confirmed to be fake because it has the same hash ID as 7973.fbl_core1_kernel_npc.110330-1809, although the buildtag and possibly the two desktop screenshots are real.