Windows 10 build 9903

{{BuildInfo
 * buildtag=10.0.9903.winmain_prs.141204-1736
 * arch=x86, x64
 * bios=2014-12-05
 * timebomb=2015-04-15 (+131 days)
 * sku=Enterprise Pro
 * }

This build is a fast-ring ESD build. It also has the Windows Default Lock-Screen App.