The MicroBooNE liquid-argon TPC detector started to take its first neutrino data from the Booster Neutrino Beam at the Fermi National Accelerator Laboratory on October 17, 2015. We have performed fullyautomated 3D reconstruction on these first data events using algorithms we have developed for the LArSoft software package, and we have developed a filter to distinguish neutrino interaction candidate events from the large number of events that contain activity originating mostly from cosmic rays. This is the first-time events from a large liquid argon TPC operating on/near the surface have been automatically reconstructed and selected for analysis. We describe the reconstruction and automated filtering procedure, and show displays of some of the first neutrino interactions observed with the detector using 1.86 × 1018 protons on target.