Things have moved on in this investigation. I failed to build VTK from scratch as none of the above resolutions worked. My suspicion being a bad windows installation.
I have now rebuilt both my laptop a Medion Akoya win 10 Home and my desktop a DELL Optiplex 9010 with win 10 Pro.
This problem does not occur on my laptop under Python 3.8 VTK 9.01 but still persists on the DELL. All other Python programs that I am developing on the DELL are fine.
It is my conclusion that the graphics card in the DELL is incompatible with VTK. As per my original post. The graphics card is build into the motherboard and I am looking to buy an extension card replacement but it;'s a bit tight in the case for duel screen versions (another problem). I read somewhere that MESA can be used as a graphics emulator but I can’t now find where I read that.
Can anyone point me towards either a solution to this - or a workaround please.
This is all very frustrating as I am new to Python and had bought this machine to make progress ij my personal development. This issue has been very complicated to work through - including the discovery of a bug in the vtk Render() command which I have posted in GitHub separately :
Python / VTK script crashes in windows
but at least I can work on my VTK project on my laptop now.
For anyone who can help the DxDiag utility produces the following report on my system :
Display Devices
Card name: Intel(R) HD Graphics
Manufacturer: Intel Corporation
Chip type: Intel(R) HD Graphics Family
DAC type: Internal
Device Type: Full Device (POST)
Device Key: Enum\PCI\VEN_8086&DEV_0102&SUBSYS_052C1028&REV_09
Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
Display Memory: 1664 MB
Dedicated Memory: 32 MB
Shared Memory: 1632 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
HDR Support: Not Supported
Display Topology: Extend
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
Color Primaries: Red(0.649414,0.334961), Green(0.283203,0.605469), Blue(0.151367,0.073242), White Point(0.312500,0.329102)
Display Luminance: Min Luminance = 0.500000, Max Luminance = 270.000000, MaxFullFrameLuminance = 270.000000