Just hang on login after update… re-downloaded from web and installed following with no change
EpicGamesLauncherInstaller-2.3.0-2602894.msi
GPU GeForce GTX 660 Ti - Driver V.353.62
CPU Intel(R) Core™ i7-3770 CPU @ 3.4GHz
16 GB RAM
OS: MS WIN 8.1 Pro Media Center