Why does IDE not open with Win 7

I have tried the many solutions posted without success.
The flash screen gets as far as 'starting'
Using arduino_debug I get this, see attached.
looks like some sort of loop that runs for about a second and then both debug and flash screen go away.
Any help would be appreciated.
tried various IDE's currently with 1.8.3 as this was proposed as a solution if 1.8.5 did not work.

Doc1.pdf (214 KB)

Why in the world would you take a picture of text on your screen and then post that to the forum as a .pdf attachment? That's just wrong in so many ways! Post the complete text as text right here in a reply using code tags (</> button on the toolbar).

Winch:
looks like some sort of loop that runs for about a second and then both debug and flash screen go away.

That makes me think you didn't run arduino_debug from the command line.

When I run the debug from the command line I get;

Looking for library 'user32'
Adding paths from jna.library.path: null
Trying user32.dll
Found library 'user32' at user32.dll
DPI detection failed, fallback to 96 dpi
Looking for library 'shell32'
Adding paths from jna.library.path: null
Trying shell32.dll
Found library 'shell32' at shell32.dll
Looking for library 'Ole32'
Adding paths from jna.library.path: null
Trying Ole32.dll
Found library 'Ole32' at Ole32.dll
Loading configuration...
Initialising packages...
Preparing boards...
Starting...

It stalls there without any more code.

If I run the debug directly, after about a minute I get about a seconds worth of the code I sent as a picture, ( as the debug screen then disappears I could not think of any other way of recording it although I am sure there is a clever way of doing it).
This may of course not be connected with the problem and hopefully I just need to change some settings. I have an old IDE on another machine working with XP and just loaded 1.8.5 on a desktop with Win10 with no problem but would like it on my Win7 laptop.
Thanks.

That's very strange that you get different results from running arduino_debug.exe from the command line.

Winch's screenshot:
Clipboard01.jpg

This is purely grasping at straws, but try running the Arduino IDE in portable mode by creating a folder named portable under the Arduino IDE installation folder:

Straws are good! Adding a portable folder worked. I shall use it in that mode. Thank you for your help.