As per the information available, the latest build of Windows 7 is compiled and is in the RTM branch. This build is 7268 and the string of this build is 6.1.7268.0.win7_rtm.090701-1900, which indicates that this build was compiled on 1^st July, 2009 at 7:00 pm.

Other recently compiled builds are:

• 6.1.7264.0.win7_rtm.090622-1900
• 6.1.7265.0.win7_rtm.090624-1905
• 6.1.7266.0.win7_rtm.090626-1902
• 6.1.7267.0.win7_rtm.090629-1952
• 6.1.7268.0.win7_rtm.090701-1900

In addition to these builds, a new build has been compiled in the winmain_sp branch,build string of this build is 6.1.7234.0.winmain_sp.090701-2012, means it was also compiled on 1^st July, 2009.