Would be most grateful for any help here, I have worked with ArcGIS for eight years now and think I have tried all my options now.
In the last two months I have attempted an install of first ArcGIS for Desktop 10.3.1 and then 10.4 directly onto (the same) 64 bit Windows 10 machine. In both cases the installation has appeared successful, and the licences for Desktop and extensions are shown as available in ArcGIS Administrator (Desktop Advanced concurrent use, using 'localhost' as licence manager).
However, I cannot launch ArcCatalog or ArcMap. Map displays the opening window and text for initialising licence and initialising application, and then just freezes indefinitely on loading document. Catalog displays the opening window with no text. Both programmes almost immediately display not responding status in task manager upon attempted launch. I have conducted a number of clean uninstalls in between attempts (using CCleaner) and clearing the registry also, but nothing I have tried has been successful. My system meets all the required hardware and software specs.
What is most frustrating is that I have two other machines running Desktop 10.3.0, initially with Win 7 64 bit OS; these were upgraded to Win 10 64 bit and I was straight back in business with ArcGIS as if nothing had changed! As I said, any and all ideas gratefully received! Thanks in advance.