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ArcMap 10.5.1 won't open after splash screen

Question asked by davidGOLIATH on Feb 2, 2018
Latest reply on Apr 27, 2018 by drewdowling

I've got ArcGIS Desktop 10.5.1 installed on a PC running 64-bit Windows 7.  When I go to open ArcMap - whether from the exe file, an exe shortcut, or an existing project file - the splash screen appears for some seconds, but then the program doesn't open.  I can open some other ArcGIS components (e.g., ArcCatalog, ArcReader) no problem, but others (e.g., ArcScene, ArcGlobe... the "viewer" applications?) act the same as ArcMap:  splash, then nothing.  I tried deleting the normal.mxt file, to no avail.  Any ideas on what's going on and how to fix it will be much appreciated.